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Finding the Fourth Proportional to 1,591.36, 2,386.32 and 616.72

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Solution

The fourth proportional to 1,591.36, 2,386.32 and 616.72 is: 924.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.36 : 2,386.32 = 616.72 : x
  2. Step 2: Convert to fraction form
    1,591.36/2,386.32 = 616.72/x
  3. Step 3: Cross multiply
    1,591.36x = 2,386.32 × 616.72
  4. Step 4: Simplify right side
    1,591.36x = 1,471,691.27
  5. Step 5: Solve for x
    x = 1,471,691.27/1,591.36
  6. Step 6: Final answer
    x = 924.80

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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.