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Finding the Fourth Proportional to 510.89, 766.07 and 279.71

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Solution

The fourth proportional to 510.89, 766.07 and 279.71 is: 419.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.89 : 766.07 = 279.71 : x
  2. Step 2: Convert to fraction form
    510.89/766.07 = 279.71/x
  3. Step 3: Cross multiply
    510.89x = 766.07 × 279.71
  4. Step 4: Simplify right side
    510.89x = 214,272.21
  5. Step 5: Solve for x
    x = 214,272.21/510.89
  6. Step 6: Final answer
    x = 419.41

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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.