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Finding the Fourth Proportional to 418,656.64, 577,761.32 and 239,843.20

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Solution

The fourth proportional to 418,656.64, 577,761.32 and 239,843.20 is: 330,992.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,656.64 : 577,761.32 = 239,843.20 : x
  2. Step 2: Convert to fraction form
    418,656.64/577,761.32 = 239,843.20/x
  3. Step 3: Cross multiply
    418,656.64x = 577,761.32 × 239,843.20
  4. Step 4: Simplify right side
    418,656.64x = 138,572,123,825.02
  5. Step 5: Solve for x
    x = 138,572,123,825.02/418,656.64
  6. Step 6: Final answer
    x = 330,992.30

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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.