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Finding the Fourth Proportional to 615.68, 918.10 and 610.13

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Solution

The fourth proportional to 615.68, 918.10 and 610.13 is: 909.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.68 : 918.10 = 610.13 : x
  2. Step 2: Convert to fraction form
    615.68/918.10 = 610.13/x
  3. Step 3: Cross multiply
    615.68x = 918.10 × 610.13
  4. Step 4: Simplify right side
    615.68x = 560,158.25
  5. Step 5: Solve for x
    x = 560,158.25/615.68
  6. Step 6: Final answer
    x = 909.82

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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.