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Finding the Fourth Proportional to 478,566.16, 717,863.15 and 178,989.57

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Solution

The fourth proportional to 478,566.16, 717,863.15 and 178,989.57 is: 268,489.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,566.16 : 717,863.15 = 178,989.57 : x
  2. Step 2: Convert to fraction form
    478,566.16/717,863.15 = 178,989.57/x
  3. Step 3: Cross multiply
    478,566.16x = 717,863.15 × 178,989.57
  4. Step 4: Simplify right side
    478,566.16x = 128,490,016,984.82
  5. Step 5: Solve for x
    x = 128,490,016,984.82/478,566.16
  6. Step 6: Final answer
    x = 268,489.56

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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.