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Finding the Fourth Proportional to 766.04, 1,057.12 and 447.07

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Solution

The fourth proportional to 766.04, 1,057.12 and 447.07 is: 616.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.04 : 1,057.12 = 447.07 : x
  2. Step 2: Convert to fraction form
    766.04/1,057.12 = 447.07/x
  3. Step 3: Cross multiply
    766.04x = 1,057.12 × 447.07
  4. Step 4: Simplify right side
    766.04x = 472,602.88
  5. Step 5: Solve for x
    x = 472,602.88/766.04
  6. Step 6: Final answer
    x = 616.94

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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.