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Finding the Fourth Proportional to 525,702,689.60, 788,554,034.40 and 389,653,793.60

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Solution

The fourth proportional to 525,702,689.60, 788,554,034.40 and 389,653,793.60 is: 584,480,690.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,702,689.60 : 788,554,034.40 = 389,653,793.60 : x
  2. Step 2: Convert to fraction form
    525,702,689.60/788,554,034.40 = 389,653,793.60/x
  3. Step 3: Cross multiply
    525,702,689.60x = 788,554,034.40 × 389,653,793.60
  4. Step 4: Simplify right side
    525,702,689.60x = 307,263,070,962,544,896
  5. Step 5: Solve for x
    x = 307,263,070,962,544,896/525,702,689.60
  6. Step 6: Final answer
    x = 584,480,690.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.