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Finding the Fourth Proportional to 891.47, 1,335.95 and 370.91

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Solution

The fourth proportional to 891.47, 1,335.95 and 370.91 is: 555.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.47 : 1,335.95 = 370.91 : x
  2. Step 2: Convert to fraction form
    891.47/1,335.95 = 370.91/x
  3. Step 3: Cross multiply
    891.47x = 1,335.95 × 370.91
  4. Step 4: Simplify right side
    891.47x = 495,514.80
  5. Step 5: Solve for x
    x = 495,514.80/891.47
  6. Step 6: Final answer
    x = 555.84

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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.