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Finding the Fourth Proportional to 766.33, 1,057.49 and 434.76

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Solution

The fourth proportional to 766.33, 1,057.49 and 434.76 is: 599.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.33 : 1,057.49 = 434.76 : x
  2. Step 2: Convert to fraction form
    766.33/1,057.49 = 434.76/x
  3. Step 3: Cross multiply
    766.33x = 1,057.49 × 434.76
  4. Step 4: Simplify right side
    766.33x = 459,754.35
  5. Step 5: Solve for x
    x = 459,754.35/766.33
  6. Step 6: Final answer
    x = 599.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.