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Finding the Fourth Proportional to 615.87, 918.36 and 610.38

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Solution

The fourth proportional to 615.87, 918.36 and 610.38 is: 910.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.87 : 918.36 = 610.38 : x
  2. Step 2: Convert to fraction form
    615.87/918.36 = 610.38/x
  3. Step 3: Cross multiply
    615.87x = 918.36 × 610.38
  4. Step 4: Simplify right side
    615.87x = 560,548.58
  5. Step 5: Solve for x
    x = 560,548.58/615.87
  6. Step 6: Final answer
    x = 910.17

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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.