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Finding the Fourth Proportional to 525,810.20, 788,715.30 and 521,144.60

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Solution

The fourth proportional to 525,810.20, 788,715.30 and 521,144.60 is: 781,716.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,810.20 : 788,715.30 = 521,144.60 : x
  2. Step 2: Convert to fraction form
    525,810.20/788,715.30 = 521,144.60/x
  3. Step 3: Cross multiply
    525,810.20x = 788,715.30 × 521,144.60
  4. Step 4: Simplify right side
    525,810.20x = 411,034,719,532.38
  5. Step 5: Solve for x
    x = 411,034,719,532.38/525,810.20
  6. Step 6: Final answer
    x = 781,716.90

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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.