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Finding the Fourth Proportional to 801.88, 1,104.21 and 783.70

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Solution

The fourth proportional to 801.88, 1,104.21 and 783.70 is: 1,079.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.88 : 1,104.21 = 783.70 : x
  2. Step 2: Convert to fraction form
    801.88/1,104.21 = 783.70/x
  3. Step 3: Cross multiply
    801.88x = 1,104.21 × 783.70
  4. Step 4: Simplify right side
    801.88x = 865,369.38
  5. Step 5: Solve for x
    x = 865,369.38/801.88
  6. Step 6: Final answer
    x = 1,079.18

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1.5x scale

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.