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Finding the Fourth Proportional to 560.99, 842.70 and 458.53

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Solution

The fourth proportional to 560.99, 842.70 and 458.53 is: 688.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.99 : 842.70 = 458.53 : x
  2. Step 2: Convert to fraction form
    560.99/842.70 = 458.53/x
  3. Step 3: Cross multiply
    560.99x = 842.70 × 458.53
  4. Step 4: Simplify right side
    560.99x = 386,402.84
  5. Step 5: Solve for x
    x = 386,402.84/560.99
  6. Step 6: Final answer
    x = 688.78

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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.