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Finding the Fourth Proportional to 804.32, 1,207.20 and 371.28

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Solution

The fourth proportional to 804.32, 1,207.20 and 371.28 is: 557.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.32 : 1,207.20 = 371.28 : x
  2. Step 2: Convert to fraction form
    804.32/1,207.20 = 371.28/x
  3. Step 3: Cross multiply
    804.32x = 1,207.20 × 371.28
  4. Step 4: Simplify right side
    804.32x = 448,209.22
  5. Step 5: Solve for x
    x = 448,209.22/804.32
  6. Step 6: Final answer
    x = 557.25

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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.