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Finding the Fourth Proportional to 1,256.97, 1,735.34 and 837.91

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Solution

The fourth proportional to 1,256.97, 1,735.34 and 837.91 is: 1,156.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.97 : 1,735.34 = 837.91 : x
  2. Step 2: Convert to fraction form
    1,256.97/1,735.34 = 837.91/x
  3. Step 3: Cross multiply
    1,256.97x = 1,735.34 × 837.91
  4. Step 4: Simplify right side
    1,256.97x = 1,454,058.74
  5. Step 5: Solve for x
    x = 1,454,058.74/1,256.97
  6. Step 6: Final answer
    x = 1,156.80

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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.