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Finding the Fourth Proportional to 1,432.64, 1,975.71 and 935.09

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Solution

The fourth proportional to 1,432.64, 1,975.71 and 935.09 is: 1,289.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.64 : 1,975.71 = 935.09 : x
  2. Step 2: Convert to fraction form
    1,432.64/1,975.71 = 935.09/x
  3. Step 3: Cross multiply
    1,432.64x = 1,975.71 × 935.09
  4. Step 4: Simplify right side
    1,432.64x = 1,847,456.79
  5. Step 5: Solve for x
    x = 1,847,456.79/1,432.64
  6. Step 6: Final answer
    x = 1,289.55

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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.