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Finding the Fourth Proportional to 611.37, 915.45 and 560.61

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Solution

The fourth proportional to 611.37, 915.45 and 560.61 is: 839.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.37 : 915.45 = 560.61 : x
  2. Step 2: Convert to fraction form
    611.37/915.45 = 560.61/x
  3. Step 3: Cross multiply
    611.37x = 915.45 × 560.61
  4. Step 4: Simplify right side
    611.37x = 513,210.42
  5. Step 5: Solve for x
    x = 513,210.42/611.37
  6. Step 6: Final answer
    x = 839.44

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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.