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Finding the Fourth Proportional to 901.02, 1,243.42 and 528.01

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Solution

The fourth proportional to 901.02, 1,243.42 and 528.01 is: 728.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.02 : 1,243.42 = 528.01 : x
  2. Step 2: Convert to fraction form
    901.02/1,243.42 = 528.01/x
  3. Step 3: Cross multiply
    901.02x = 1,243.42 × 528.01
  4. Step 4: Simplify right side
    901.02x = 656,535.55
  5. Step 5: Solve for x
    x = 656,535.55/901.02
  6. Step 6: Final answer
    x = 728.66

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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.