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Finding the Fourth Proportional to 1,353.25, 1,867.44 and 755.78

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Solution

The fourth proportional to 1,353.25, 1,867.44 and 755.78 is: 1,042.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.25 : 1,867.44 = 755.78 : x
  2. Step 2: Convert to fraction form
    1,353.25/1,867.44 = 755.78/x
  3. Step 3: Cross multiply
    1,353.25x = 1,867.44 × 755.78
  4. Step 4: Simplify right side
    1,353.25x = 1,411,364.47
  5. Step 5: Solve for x
    x = 1,411,364.47/1,353.25
  6. Step 6: Final answer
    x = 1,042.94

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1.5x scale

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.