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Finding the Fourth Proportional to 525,307.80, 786,795.30 and 431,995.80

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Solution

The fourth proportional to 525,307.80, 786,795.30 and 431,995.80 is: 647,034.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,307.80 : 786,795.30 = 431,995.80 : x
  2. Step 2: Convert to fraction form
    525,307.80/786,795.30 = 431,995.80/x
  3. Step 3: Cross multiply
    525,307.80x = 786,795.30 × 431,995.80
  4. Step 4: Simplify right side
    525,307.80x = 339,892,265,059.74
  5. Step 5: Solve for x
    x = 339,892,265,059.74/525,307.80
  6. Step 6: Final answer
    x = 647,034.49

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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.