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Finding the Fourth Proportional to 766.51, 1,057.80 and 434.87

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Solution

The fourth proportional to 766.51, 1,057.80 and 434.87 is: 600.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.51 : 1,057.80 = 434.87 : x
  2. Step 2: Convert to fraction form
    766.51/1,057.80 = 434.87/x
  3. Step 3: Cross multiply
    766.51x = 1,057.80 × 434.87
  4. Step 4: Simplify right side
    766.51x = 459,998.02
  5. Step 5: Solve for x
    x = 459,998.02/766.51
  6. Step 6: Final answer
    x = 600.12

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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.