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Finding the Fourth Proportional to 478,422.78, 717,385.08 and 178,656.87

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Solution

The fourth proportional to 478,422.78, 717,385.08 and 178,656.87 is: 267,892.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,422.78 : 717,385.08 = 178,656.87 : x
  2. Step 2: Convert to fraction form
    478,422.78/717,385.08 = 178,656.87/x
  3. Step 3: Cross multiply
    478,422.78x = 717,385.08 × 178,656.87
  4. Step 4: Simplify right side
    478,422.78x = 128,165,772,977.50
  5. Step 5: Solve for x
    x = 128,165,772,977.50/478,422.78
  6. Step 6: Final answer
    x = 267,892.29

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1.5x scale

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.