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Finding the Fourth Proportional to 803.71, 1,109.15 and 454.38

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Solution

The fourth proportional to 803.71, 1,109.15 and 454.38 is: 627.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.71 : 1,109.15 = 454.38 : x
  2. Step 2: Convert to fraction form
    803.71/1,109.15 = 454.38/x
  3. Step 3: Cross multiply
    803.71x = 1,109.15 × 454.38
  4. Step 4: Simplify right side
    803.71x = 503,975.58
  5. Step 5: Solve for x
    x = 503,975.58/803.71
  6. Step 6: Final answer
    x = 627.06

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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.