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Finding the Fourth Proportional to 901.61, 1,353.02 and 439.70

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Solution

The fourth proportional to 901.61, 1,353.02 and 439.70 is: 659.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.61 : 1,353.02 = 439.70 : x
  2. Step 2: Convert to fraction form
    901.61/1,353.02 = 439.70/x
  3. Step 3: Cross multiply
    901.61x = 1,353.02 × 439.70
  4. Step 4: Simplify right side
    901.61x = 594,924.08
  5. Step 5: Solve for x
    x = 594,924.08/901.61
  6. Step 6: Final answer
    x = 659.85

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Double scale
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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.