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Finding the Fourth Proportional to 610.28, 915.41 and 391.01

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Solution

The fourth proportional to 610.28, 915.41 and 391.01 is: 586.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.28 : 915.41 = 391.01 : x
  2. Step 2: Convert to fraction form
    610.28/915.41 = 391.01/x
  3. Step 3: Cross multiply
    610.28x = 915.41 × 391.01
  4. Step 4: Simplify right side
    610.28x = 357,927.93
  5. Step 5: Solve for x
    x = 357,927.93/610.28
  6. Step 6: Final answer
    x = 586.50

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Double scale
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Similar ratio
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1.5x scale

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.