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Finding the Fourth Proportional to 477.26, 658.80 and 290.76

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Solution

The fourth proportional to 477.26, 658.80 and 290.76 is: 401.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.26 : 658.80 = 290.76 : x
  2. Step 2: Convert to fraction form
    477.26/658.80 = 290.76/x
  3. Step 3: Cross multiply
    477.26x = 658.80 × 290.76
  4. Step 4: Simplify right side
    477.26x = 191,552.69
  5. Step 5: Solve for x
    x = 191,552.69/477.26
  6. Step 6: Final answer
    x = 401.36

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Find fourth proportional to 238.63, 329.40 and 145.38
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Double scale
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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.