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Finding the Fourth Proportional to 616.76, 918.82 and 579.56

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Solution

The fourth proportional to 616.76, 918.82 and 579.56 is: 863.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.76 : 918.82 = 579.56 : x
  2. Step 2: Convert to fraction form
    616.76/918.82 = 579.56/x
  3. Step 3: Cross multiply
    616.76x = 918.82 × 579.56
  4. Step 4: Simplify right side
    616.76x = 532,511.32
  5. Step 5: Solve for x
    x = 532,511.32/616.76
  6. Step 6: Final answer
    x = 863.40

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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.