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Finding the Fourth Proportional to 901.57, 1,244.58 and 528.43

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Solution

The fourth proportional to 901.57, 1,244.58 and 528.43 is: 729.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.57 : 1,244.58 = 528.43 : x
  2. Step 2: Convert to fraction form
    901.57/1,244.58 = 528.43/x
  3. Step 3: Cross multiply
    901.57x = 1,244.58 × 528.43
  4. Step 4: Simplify right side
    901.57x = 657,673.41
  5. Step 5: Solve for x
    x = 657,673.41/901.57
  6. Step 6: Final answer
    x = 729.48

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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.