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Finding the Fourth Proportional to 807.88, 1,211.10 and 375.16

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Solution

The fourth proportional to 807.88, 1,211.10 and 375.16 is: 562.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.88 : 1,211.10 = 375.16 : x
  2. Step 2: Convert to fraction form
    807.88/1,211.10 = 375.16/x
  3. Step 3: Cross multiply
    807.88x = 1,211.10 × 375.16
  4. Step 4: Simplify right side
    807.88x = 454,356.28
  5. Step 5: Solve for x
    x = 454,356.28/807.88
  6. Step 6: Final answer
    x = 562.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.