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Finding the Fourth Proportional to 543,810.60, 815,715.90 and 403,842.60

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Solution

The fourth proportional to 543,810.60, 815,715.90 and 403,842.60 is: 605,763.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,810.60 : 815,715.90 = 403,842.60 : x
  2. Step 2: Convert to fraction form
    543,810.60/815,715.90 = 403,842.60/x
  3. Step 3: Cross multiply
    543,810.60x = 815,715.90 × 403,842.60
  4. Step 4: Simplify right side
    543,810.60x = 329,420,829,917.34
  5. Step 5: Solve for x
    x = 329,420,829,917.34/543,810.60
  6. Step 6: Final answer
    x = 605,763.90

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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.