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Finding the Fourth Proportional to 407.80, 562.47 and 260.17

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Solution

The fourth proportional to 407.80, 562.47 and 260.17 is: 358.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.80 : 562.47 = 260.17 : x
  2. Step 2: Convert to fraction form
    407.80/562.47 = 260.17/x
  3. Step 3: Cross multiply
    407.80x = 562.47 × 260.17
  4. Step 4: Simplify right side
    407.80x = 146,337.82
  5. Step 5: Solve for x
    x = 146,337.82/407.80
  6. Step 6: Final answer
    x = 358.85

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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.