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Finding the Fourth Proportional to 801.53, 1,106.20 and 469.95

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Solution

The fourth proportional to 801.53, 1,106.20 and 469.95 is: 648.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.53 : 1,106.20 = 469.95 : x
  2. Step 2: Convert to fraction form
    801.53/1,106.20 = 469.95/x
  3. Step 3: Cross multiply
    801.53x = 1,106.20 × 469.95
  4. Step 4: Simplify right side
    801.53x = 519,857.52
  5. Step 5: Solve for x
    x = 519,857.52/801.53
  6. Step 6: Final answer
    x = 648.59

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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.