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Finding the Fourth Proportional to 691, 951.92 and 581.10

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Solution

The fourth proportional to 691, 951.92 and 581.10 is: 800.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    691 : 951.92 = 581.10 : x
  2. Step 2: Convert to fraction form
    691/951.92 = 581.10/x
  3. Step 3: Cross multiply
    691x = 951.92 × 581.10
  4. Step 4: Simplify right side
    691x = 553,160.71
  5. Step 5: Solve for x
    x = 553,160.71/691
  6. Step 6: Final answer
    x = 800.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.