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Finding the Fourth Proportional to 656,799.74, 906,385.19 and 354,993.74

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Solution

The fourth proportional to 656,799.74, 906,385.19 and 354,993.74 is: 489,892.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,799.74 : 906,385.19 = 354,993.74 : x
  2. Step 2: Convert to fraction form
    656,799.74/906,385.19 = 354,993.74/x
  3. Step 3: Cross multiply
    656,799.74x = 906,385.19 × 354,993.74
  4. Step 4: Simplify right side
    656,799.74x = 321,761,068,478.71
  5. Step 5: Solve for x
    x = 321,761,068,478.71/656,799.74
  6. Step 6: Final answer
    x = 489,892.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.