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Finding the Fourth Proportional to 630.12, 939.64 and 616.17

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Solution

The fourth proportional to 630.12, 939.64 and 616.17 is: 918.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.12 : 939.64 = 616.17 : x
  2. Step 2: Convert to fraction form
    630.12/939.64 = 616.17/x
  3. Step 3: Cross multiply
    630.12x = 939.64 × 616.17
  4. Step 4: Simplify right side
    630.12x = 578,977.98
  5. Step 5: Solve for x
    x = 578,977.98/630.12
  6. Step 6: Final answer
    x = 918.84

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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.