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Finding the Fourth Proportional to 901.40, 1,243.52 and 552.02

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Solution

The fourth proportional to 901.40, 1,243.52 and 552.02 is: 761.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.40 : 1,243.52 = 552.02 : x
  2. Step 2: Convert to fraction form
    901.40/1,243.52 = 552.02/x
  3. Step 3: Cross multiply
    901.40x = 1,243.52 × 552.02
  4. Step 4: Simplify right side
    901.40x = 686,447.91
  5. Step 5: Solve for x
    x = 686,447.91/901.40
  6. Step 6: Final answer
    x = 761.54

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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.