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Finding the Fourth Proportional to 586.49, 879.38 and 432.79

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Solution

The fourth proportional to 586.49, 879.38 and 432.79 is: 648.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.49 : 879.38 = 432.79 : x
  2. Step 2: Convert to fraction form
    586.49/879.38 = 432.79/x
  3. Step 3: Cross multiply
    586.49x = 879.38 × 432.79
  4. Step 4: Simplify right side
    586.49x = 380,586.87
  5. Step 5: Solve for x
    x = 380,586.87/586.49
  6. Step 6: Final answer
    x = 648.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.