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Finding the Fourth Proportional to 1,415.24, 1,952.68 and 825.64

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Solution

The fourth proportional to 1,415.24, 1,952.68 and 825.64 is: 1,139.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.24 : 1,952.68 = 825.64 : x
  2. Step 2: Convert to fraction form
    1,415.24/1,952.68 = 825.64/x
  3. Step 3: Cross multiply
    1,415.24x = 1,952.68 × 825.64
  4. Step 4: Simplify right side
    1,415.24x = 1,612,210.72
  5. Step 5: Solve for x
    x = 1,612,210.72/1,415.24
  6. Step 6: Final answer
    x = 1,139.18

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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.