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Finding the Fourth Proportional to 1,061.95, 1,591.30 and 445.32

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Solution

The fourth proportional to 1,061.95, 1,591.30 and 445.32 is: 667.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,061.95 : 1,591.30 = 445.32 : x
  2. Step 2: Convert to fraction form
    1,061.95/1,591.30 = 445.32/x
  3. Step 3: Cross multiply
    1,061.95x = 1,591.30 × 445.32
  4. Step 4: Simplify right side
    1,061.95x = 708,630.64
  5. Step 5: Solve for x
    x = 708,630.64/1,061.95
  6. Step 6: Final answer
    x = 667.29

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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.