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Finding the Fourth Proportional to 1,354.85, 2,034.40 and 801.28

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Solution

The fourth proportional to 1,354.85, 2,034.40 and 801.28 is: 1,203.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.85 : 2,034.40 = 801.28 : x
  2. Step 2: Convert to fraction form
    1,354.85/2,034.40 = 801.28/x
  3. Step 3: Cross multiply
    1,354.85x = 2,034.40 × 801.28
  4. Step 4: Simplify right side
    1,354.85x = 1,630,124.03
  5. Step 5: Solve for x
    x = 1,630,124.03/1,354.85
  6. Step 6: Final answer
    x = 1,203.18

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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.