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Finding the Fourth Proportional to 766.66, 1,057.94 and 435.12

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Solution

The fourth proportional to 766.66, 1,057.94 and 435.12 is: 600.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.66 : 1,057.94 = 435.12 : x
  2. Step 2: Convert to fraction form
    766.66/1,057.94 = 435.12/x
  3. Step 3: Cross multiply
    766.66x = 1,057.94 × 435.12
  4. Step 4: Simplify right side
    766.66x = 460,330.85
  5. Step 5: Solve for x
    x = 460,330.85/766.66
  6. Step 6: Final answer
    x = 600.44

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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.