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Finding the Fourth Proportional to 1,439, 2,157.44 and 616.76

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Solution

The fourth proportional to 1,439, 2,157.44 and 616.76 is: 924.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439 : 2,157.44 = 616.76 : x
  2. Step 2: Convert to fraction form
    1,439/2,157.44 = 616.76/x
  3. Step 3: Cross multiply
    1,439x = 2,157.44 × 616.76
  4. Step 4: Simplify right side
    1,439x = 1,330,622.69
  5. Step 5: Solve for x
    x = 1,330,622.69/1,439
  6. Step 6: Final answer
    x = 924.69

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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.