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Finding the Fourth Proportional to 901.61, 1,351.49 and 577.20

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Solution

The fourth proportional to 901.61, 1,351.49 and 577.20 is: 865.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.61 : 1,351.49 = 577.20 : x
  2. Step 2: Convert to fraction form
    901.61/1,351.49 = 577.20/x
  3. Step 3: Cross multiply
    901.61x = 1,351.49 × 577.20
  4. Step 4: Simplify right side
    901.61x = 780,077.14
  5. Step 5: Solve for x
    x = 780,077.14/901.61
  6. Step 6: Final answer
    x = 865.21

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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.