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Finding the Fourth Proportional to 901.40, 1,352.21 and 887.31

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Solution

The fourth proportional to 901.40, 1,352.21 and 887.31 is: 1,331.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.40 : 1,352.21 = 887.31 : x
  2. Step 2: Convert to fraction form
    901.40/1,352.21 = 887.31/x
  3. Step 3: Cross multiply
    901.40x = 1,352.21 × 887.31
  4. Step 4: Simplify right side
    901.40x = 1,199,825.02
  5. Step 5: Solve for x
    x = 1,199,825.02/901.40
  6. Step 6: Final answer
    x = 1,331.08

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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.