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Finding the Fourth Proportional to 614.49, 915.88 and 579.90

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Solution

The fourth proportional to 614.49, 915.88 and 579.90 is: 864.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.49 : 915.88 = 579.90 : x
  2. Step 2: Convert to fraction form
    614.49/915.88 = 579.90/x
  3. Step 3: Cross multiply
    614.49x = 915.88 × 579.90
  4. Step 4: Simplify right side
    614.49x = 531,118.81
  5. Step 5: Solve for x
    x = 531,118.81/614.49
  6. Step 6: Final answer
    x = 864.32

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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.