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Finding the Fourth Proportional to 611,291.60, 916,937.40 and 361,845.20

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Solution

The fourth proportional to 611,291.60, 916,937.40 and 361,845.20 is: 542,767.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,291.60 : 916,937.40 = 361,845.20 : x
  2. Step 2: Convert to fraction form
    611,291.60/916,937.40 = 361,845.20/x
  3. Step 3: Cross multiply
    611,291.60x = 916,937.40 × 361,845.20
  4. Step 4: Simplify right side
    611,291.60x = 331,789,396,890.48
  5. Step 5: Solve for x
    x = 331,789,396,890.48/611,291.60
  6. Step 6: Final answer
    x = 542,767.80

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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.