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Finding the Fourth Proportional to 1,275.42, 1,758.47 and 832.62

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Solution

The fourth proportional to 1,275.42, 1,758.47 and 832.62 is: 1,147.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.42 : 1,758.47 = 832.62 : x
  2. Step 2: Convert to fraction form
    1,275.42/1,758.47 = 832.62/x
  3. Step 3: Cross multiply
    1,275.42x = 1,758.47 × 832.62
  4. Step 4: Simplify right side
    1,275.42x = 1,464,133.13
  5. Step 5: Solve for x
    x = 1,464,133.13/1,275.42
  6. Step 6: Final answer
    x = 1,147.96

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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.