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Finding the Fourth Proportional to 610.49, 915.26 and 317.86

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Solution

The fourth proportional to 610.49, 915.26 and 317.86 is: 476.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.49 : 915.26 = 317.86 : x
  2. Step 2: Convert to fraction form
    610.49/915.26 = 317.86/x
  3. Step 3: Cross multiply
    610.49x = 915.26 × 317.86
  4. Step 4: Simplify right side
    610.49x = 290,924.54
  5. Step 5: Solve for x
    x = 290,924.54/610.49
  6. Step 6: Final answer
    x = 476.54

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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.