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Finding the Fourth Proportional to 543,808.60, 815,712.90 and 417,691.60

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Solution

The fourth proportional to 543,808.60, 815,712.90 and 417,691.60 is: 626,537.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,808.60 : 815,712.90 = 417,691.60 : x
  2. Step 2: Convert to fraction form
    543,808.60/815,712.90 = 417,691.60/x
  3. Step 3: Cross multiply
    543,808.60x = 815,712.90 × 417,691.60
  4. Step 4: Simplify right side
    543,808.60x = 340,716,426,341.64
  5. Step 5: Solve for x
    x = 340,716,426,341.64/543,808.60
  6. Step 6: Final answer
    x = 626,537.40

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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.