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Finding the Fourth Proportional to 527,645.78, 791,468.70 and 128,283.89

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Solution

The fourth proportional to 527,645.78, 791,468.70 and 128,283.89 is: 192,425.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,645.78 : 791,468.70 = 128,283.89 : x
  2. Step 2: Convert to fraction form
    527,645.78/791,468.70 = 128,283.89/x
  3. Step 3: Cross multiply
    527,645.78x = 791,468.70 × 128,283.89
  4. Step 4: Simplify right side
    527,645.78x = 101,532,683,649.24
  5. Step 5: Solve for x
    x = 101,532,683,649.24/527,645.78
  6. Step 6: Final answer
    x = 192,425.84

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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.