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Finding the Fourth Proportional to 900.24, 1,243.04 and 704.31

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Solution

The fourth proportional to 900.24, 1,243.04 and 704.31 is: 972.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.24 : 1,243.04 = 704.31 : x
  2. Step 2: Convert to fraction form
    900.24/1,243.04 = 704.31/x
  3. Step 3: Cross multiply
    900.24x = 1,243.04 × 704.31
  4. Step 4: Simplify right side
    900.24x = 875,485.50
  5. Step 5: Solve for x
    x = 875,485.50/900.24
  6. Step 6: Final answer
    x = 972.50

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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.