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Finding the Fourth Proportional to 478,565.90, 717,862.77 and 178,989.32

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Solution

The fourth proportional to 478,565.90, 717,862.77 and 178,989.32 is: 268,489.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,565.90 : 717,862.77 = 178,989.32 : x
  2. Step 2: Convert to fraction form
    478,565.90/717,862.77 = 178,989.32/x
  3. Step 3: Cross multiply
    478,565.90x = 717,862.77 × 178,989.32
  4. Step 4: Simplify right side
    478,565.90x = 128,489,769,055.62
  5. Step 5: Solve for x
    x = 128,489,769,055.62/478,565.90
  6. Step 6: Final answer
    x = 268,489.19

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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.