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Finding the Fourth Proportional to 901.40, 1,352.17 and 285.12

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Solution

The fourth proportional to 901.40, 1,352.17 and 285.12 is: 427.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.40 : 1,352.17 = 285.12 : x
  2. Step 2: Convert to fraction form
    901.40/1,352.17 = 285.12/x
  3. Step 3: Cross multiply
    901.40x = 1,352.17 × 285.12
  4. Step 4: Simplify right side
    901.40x = 385,530.26
  5. Step 5: Solve for x
    x = 385,530.26/901.40
  6. Step 6: Final answer
    x = 427.70

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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.