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Finding the Fourth Proportional to 610.50, 915.06 and 285.19

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Solution

The fourth proportional to 610.50, 915.06 and 285.19 is: 427.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.50 : 915.06 = 285.19 : x
  2. Step 2: Convert to fraction form
    610.50/915.06 = 285.19/x
  3. Step 3: Cross multiply
    610.50x = 915.06 × 285.19
  4. Step 4: Simplify right side
    610.50x = 260,964.74
  5. Step 5: Solve for x
    x = 260,964.74/610.50
  6. Step 6: Final answer
    x = 427.46

Related Problems

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Half scale
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Double scale
Find fourth proportional to 611.50, 916.56 and 286.19
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.