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Finding the Fourth Proportional to 901.40, 1,352.07 and 490.43

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Solution

The fourth proportional to 901.40, 1,352.07 and 490.43 is: 735.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.40 : 1,352.07 = 490.43 : x
  2. Step 2: Convert to fraction form
    901.40/1,352.07 = 490.43/x
  3. Step 3: Cross multiply
    901.40x = 1,352.07 × 490.43
  4. Step 4: Simplify right side
    901.40x = 663,099.07
  5. Step 5: Solve for x
    x = 663,099.07/901.40
  6. Step 6: Final answer
    x = 735.64

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Half scale
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Double scale
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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.