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Finding the Fourth Proportional to 901.50, 1,243.53 and 552.30

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Solution

The fourth proportional to 901.50, 1,243.53 and 552.30 is: 761.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.50 : 1,243.53 = 552.30 : x
  2. Step 2: Convert to fraction form
    901.50/1,243.53 = 552.30/x
  3. Step 3: Cross multiply
    901.50x = 1,243.53 × 552.30
  4. Step 4: Simplify right side
    901.50x = 686,801.62
  5. Step 5: Solve for x
    x = 686,801.62/901.50
  6. Step 6: Final answer
    x = 761.84

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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.