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Finding the Fourth Proportional to 510.93, 766.40 and 254.61

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Solution

The fourth proportional to 510.93, 766.40 and 254.61 is: 381.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.93 : 766.40 = 254.61 : x
  2. Step 2: Convert to fraction form
    510.93/766.40 = 254.61/x
  3. Step 3: Cross multiply
    510.93x = 766.40 × 254.61
  4. Step 4: Simplify right side
    510.93x = 195,131.83
  5. Step 5: Solve for x
    x = 195,131.83/510.93
  6. Step 6: Final answer
    x = 381.92

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Half scale
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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.