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Finding the Fourth Proportional to 579.56, 867.42 and 434.28

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Solution

The fourth proportional to 579.56, 867.42 and 434.28 is: 649.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.56 : 867.42 = 434.28 : x
  2. Step 2: Convert to fraction form
    579.56/867.42 = 434.28/x
  3. Step 3: Cross multiply
    579.56x = 867.42 × 434.28
  4. Step 4: Simplify right side
    579.56x = 376,703.16
  5. Step 5: Solve for x
    x = 376,703.16/579.56
  6. Step 6: Final answer
    x = 649.98

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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.