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Finding the Fourth Proportional to 478,686.90, 717,046.20 and 329,096.10

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Solution

The fourth proportional to 478,686.90, 717,046.20 and 329,096.10 is: 492,967.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,686.90 : 717,046.20 = 329,096.10 : x
  2. Step 2: Convert to fraction form
    478,686.90/717,046.20 = 329,096.10/x
  3. Step 3: Cross multiply
    478,686.90x = 717,046.20 × 329,096.10
  4. Step 4: Simplify right side
    478,686.90x = 235,977,107,939.82
  5. Step 5: Solve for x
    x = 235,977,107,939.82/478,686.90
  6. Step 6: Final answer
    x = 492,967.55

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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.