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Finding the Fourth Proportional to 901.31, 1,243.82 and 528.32

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Solution

The fourth proportional to 901.31, 1,243.82 and 528.32 is: 729.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.31 : 1,243.82 = 528.32 : x
  2. Step 2: Convert to fraction form
    901.31/1,243.82 = 528.32/x
  3. Step 3: Cross multiply
    901.31x = 1,243.82 × 528.32
  4. Step 4: Simplify right side
    901.31x = 657,139.41
  5. Step 5: Solve for x
    x = 657,139.41/901.31
  6. Step 6: Final answer
    x = 729.10

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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.