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Finding the Fourth Proportional to 664,714.60, 996,862.76 and 215,331.21

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Solution

The fourth proportional to 664,714.60, 996,862.76 and 215,331.21 is: 322,929.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,714.60 : 996,862.76 = 215,331.21 : x
  2. Step 2: Convert to fraction form
    664,714.60/996,862.76 = 215,331.21/x
  3. Step 3: Cross multiply
    664,714.60x = 996,862.76 × 215,331.21
  4. Step 4: Simplify right side
    664,714.60x = 214,655,664,314.74
  5. Step 5: Solve for x
    x = 214,655,664,314.74/664,714.60
  6. Step 6: Final answer
    x = 322,929.07

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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.