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Finding the Fourth Proportional to 825.48, 1,240.38 and 695.88

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Solution

The fourth proportional to 825.48, 1,240.38 and 695.88 is: 1,045.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.48 : 1,240.38 = 695.88 : x
  2. Step 2: Convert to fraction form
    825.48/1,240.38 = 695.88/x
  3. Step 3: Cross multiply
    825.48x = 1,240.38 × 695.88
  4. Step 4: Simplify right side
    825.48x = 863,155.63
  5. Step 5: Solve for x
    x = 863,155.63/825.48
  6. Step 6: Final answer
    x = 1,045.64

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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.