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Finding the Fourth Proportional to 510.83, 766.85 and 402.69

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Solution

The fourth proportional to 510.83, 766.85 and 402.69 is: 604.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.83 : 766.85 = 402.69 : x
  2. Step 2: Convert to fraction form
    510.83/766.85 = 402.69/x
  3. Step 3: Cross multiply
    510.83x = 766.85 × 402.69
  4. Step 4: Simplify right side
    510.83x = 308,800.81
  5. Step 5: Solve for x
    x = 308,800.81/510.83
  6. Step 6: Final answer
    x = 604.51

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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.