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Finding the Fourth Proportional to 393,368,374.60, 549,640,770.20 and 393,368,374.60

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Solution

The fourth proportional to 393,368,374.60, 549,640,770.20 and 393,368,374.60 is: 549,640,770.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,368,374.60 : 549,640,770.20 = 393,368,374.60 : x
  2. Step 2: Convert to fraction form
    393,368,374.60/549,640,770.20 = 393,368,374.60/x
  3. Step 3: Cross multiply
    393,368,374.60x = 549,640,770.20 × 393,368,374.60
  4. Step 4: Simplify right side
    393,368,374.60x = 216,211,296,387,466,144
  5. Step 5: Solve for x
    x = 216,211,296,387,466,144/393,368,374.60
  6. Step 6: Final answer
    x = 549,640,770.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.