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Finding the Fourth Proportional to 478,564.90, 717,861.27 and 178,988.32

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Solution

The fourth proportional to 478,564.90, 717,861.27 and 178,988.32 is: 268,487.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,564.90 : 717,861.27 = 178,988.32 : x
  2. Step 2: Convert to fraction form
    478,564.90/717,861.27 = 178,988.32/x
  3. Step 3: Cross multiply
    478,564.90x = 717,861.27 × 178,988.32
  4. Step 4: Simplify right side
    478,564.90x = 128,488,782,710.37
  5. Step 5: Solve for x
    x = 128,488,782,710.37/478,564.90
  6. Step 6: Final answer
    x = 268,487.69

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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.