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Finding the Fourth Proportional to 901.49, 1,351.65 and 353.72

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Solution

The fourth proportional to 901.49, 1,351.65 and 353.72 is: 530.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.49 : 1,351.65 = 353.72 : x
  2. Step 2: Convert to fraction form
    901.49/1,351.65 = 353.72/x
  3. Step 3: Cross multiply
    901.49x = 1,351.65 × 353.72
  4. Step 4: Simplify right side
    901.49x = 478,109.02
  5. Step 5: Solve for x
    x = 478,109.02/901.49
  6. Step 6: Final answer
    x = 530.36

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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.