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Finding the Fourth Proportional to 807.80, 1,114.88 and 458.48

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Solution

The fourth proportional to 807.80, 1,114.88 and 458.48 is: 632.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.80 : 1,114.88 = 458.48 : x
  2. Step 2: Convert to fraction form
    807.80/1,114.88 = 458.48/x
  3. Step 3: Cross multiply
    807.80x = 1,114.88 × 458.48
  4. Step 4: Simplify right side
    807.80x = 511,150.18
  5. Step 5: Solve for x
    x = 511,150.18/807.80
  6. Step 6: Final answer
    x = 632.77

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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.