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Finding the Fourth Proportional to 478,025.20, 717,070.20 and 162,505.90

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Solution

The fourth proportional to 478,025.20, 717,070.20 and 162,505.90 is: 243,769.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,025.20 : 717,070.20 = 162,505.90 : x
  2. Step 2: Convert to fraction form
    478,025.20/717,070.20 = 162,505.90/x
  3. Step 3: Cross multiply
    478,025.20x = 717,070.20 × 162,505.90
  4. Step 4: Simplify right side
    478,025.20x = 116,528,138,214.18
  5. Step 5: Solve for x
    x = 116,528,138,214.18/478,025.20
  6. Step 6: Final answer
    x = 243,769.86

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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.