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Finding the Fourth Proportional to 610.70, 916.18 and 281.63

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Solution

The fourth proportional to 610.70, 916.18 and 281.63 is: 422.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.70 : 916.18 = 281.63 : x
  2. Step 2: Convert to fraction form
    610.70/916.18 = 281.63/x
  3. Step 3: Cross multiply
    610.70x = 916.18 × 281.63
  4. Step 4: Simplify right side
    610.70x = 258,019.19
  5. Step 5: Solve for x
    x = 258,019.19/610.70
  6. Step 6: Final answer
    x = 422.50

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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.