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Finding the Fourth Proportional to 1,256.00, 1,732.19 and 807.39

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Solution

The fourth proportional to 1,256.00, 1,732.19 and 807.39 is: 1,113.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.00 : 1,732.19 = 807.39 : x
  2. Step 2: Convert to fraction form
    1,256.00/1,732.19 = 807.39/x
  3. Step 3: Cross multiply
    1,256.00x = 1,732.19 × 807.39
  4. Step 4: Simplify right side
    1,256.00x = 1,398,548.85
  5. Step 5: Solve for x
    x = 1,398,548.85/1,256.00
  6. Step 6: Final answer
    x = 1,113.50

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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.