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Finding the Fourth Proportional to 527.99, 788.11 and 489.92

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Solution

The fourth proportional to 527.99, 788.11 and 489.92 is: 731.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.99 : 788.11 = 489.92 : x
  2. Step 2: Convert to fraction form
    527.99/788.11 = 489.92/x
  3. Step 3: Cross multiply
    527.99x = 788.11 × 489.92
  4. Step 4: Simplify right side
    527.99x = 386,105.69
  5. Step 5: Solve for x
    x = 386,105.69/527.99
  6. Step 6: Final answer
    x = 731.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.