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Finding the Fourth Proportional to 616.08, 919.80 and 513.52

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Solution

The fourth proportional to 616.08, 919.80 and 513.52 is: 766.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.08 : 919.80 = 513.52 : x
  2. Step 2: Convert to fraction form
    616.08/919.80 = 513.52/x
  3. Step 3: Cross multiply
    616.08x = 919.80 × 513.52
  4. Step 4: Simplify right side
    616.08x = 472,335.70
  5. Step 5: Solve for x
    x = 472,335.70/616.08
  6. Step 6: Final answer
    x = 766.68

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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.