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Finding the Fourth Proportional to 901.72, 1,244.26 and 528.62

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Solution

The fourth proportional to 901.72, 1,244.26 and 528.62 is: 729.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.72 : 1,244.26 = 528.62 : x
  2. Step 2: Convert to fraction form
    901.72/1,244.26 = 528.62/x
  3. Step 3: Cross multiply
    901.72x = 1,244.26 × 528.62
  4. Step 4: Simplify right side
    901.72x = 657,731.86
  5. Step 5: Solve for x
    x = 657,731.86/901.72
  6. Step 6: Final answer
    x = 729.42

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.