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Finding the Fourth Proportional to 901.38, 1,352.86 and 439.50

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Solution

The fourth proportional to 901.38, 1,352.86 and 439.50 is: 659.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.38 : 1,352.86 = 439.50 : x
  2. Step 2: Convert to fraction form
    901.38/1,352.86 = 439.50/x
  3. Step 3: Cross multiply
    901.38x = 1,352.86 × 439.50
  4. Step 4: Simplify right side
    901.38x = 594,581.97
  5. Step 5: Solve for x
    x = 594,581.97/901.38
  6. Step 6: Final answer
    x = 659.64

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1.5x scale

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.