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Finding the Fourth Proportional to 1,069.28, 1,603.92 and 375.95

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Solution

The fourth proportional to 1,069.28, 1,603.92 and 375.95 is: 563.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.28 : 1,603.92 = 375.95 : x
  2. Step 2: Convert to fraction form
    1,069.28/1,603.92 = 375.95/x
  3. Step 3: Cross multiply
    1,069.28x = 1,603.92 × 375.95
  4. Step 4: Simplify right side
    1,069.28x = 602,985.70
  5. Step 5: Solve for x
    x = 602,985.70/1,069.28
  6. Step 6: Final answer
    x = 563.92

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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.