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Finding the Fourth Proportional to 1,407.52, 1,928.28 and 1,354.95

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Solution

The fourth proportional to 1,407.52, 1,928.28 and 1,354.95 is: 1,856.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.52 : 1,928.28 = 1,354.95 : x
  2. Step 2: Convert to fraction form
    1,407.52/1,928.28 = 1,354.95/x
  3. Step 3: Cross multiply
    1,407.52x = 1,928.28 × 1,354.95
  4. Step 4: Simplify right side
    1,407.52x = 2,612,728.07
  5. Step 5: Solve for x
    x = 2,612,728.07/1,407.52
  6. Step 6: Final answer
    x = 1,856.26

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.