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Finding the Fourth Proportional to 699.52, 1,047.48 and 631.48

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Solution

The fourth proportional to 699.52, 1,047.48 and 631.48 is: 945.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.52 : 1,047.48 = 631.48 : x
  2. Step 2: Convert to fraction form
    699.52/1,047.48 = 631.48/x
  3. Step 3: Cross multiply
    699.52x = 1,047.48 × 631.48
  4. Step 4: Simplify right side
    699.52x = 661,462.67
  5. Step 5: Solve for x
    x = 661,462.67/699.52
  6. Step 6: Final answer
    x = 945.60

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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.