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Finding the Fourth Proportional to 355.91, 531.47 and 291.04

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Solution

The fourth proportional to 355.91, 531.47 and 291.04 is: 434.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.91 : 531.47 = 291.04 : x
  2. Step 2: Convert to fraction form
    355.91/531.47 = 291.04/x
  3. Step 3: Cross multiply
    355.91x = 531.47 × 291.04
  4. Step 4: Simplify right side
    355.91x = 154,676.24
  5. Step 5: Solve for x
    x = 154,676.24/355.91
  6. Step 6: Final answer
    x = 434.59

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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.