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Finding the Fourth Proportional to 766.49, 1,057.76 and 434.92

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Solution

The fourth proportional to 766.49, 1,057.76 and 434.92 is: 600.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.49 : 1,057.76 = 434.92 : x
  2. Step 2: Convert to fraction form
    766.49/1,057.76 = 434.92/x
  3. Step 3: Cross multiply
    766.49x = 1,057.76 × 434.92
  4. Step 4: Simplify right side
    766.49x = 460,040.98
  5. Step 5: Solve for x
    x = 460,040.98/766.49
  6. Step 6: Final answer
    x = 600.19

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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.