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Finding the Fourth Proportional to 1,258.70, 1,735.20 and 959.94

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Solution

The fourth proportional to 1,258.70, 1,735.20 and 959.94 is: 1,323.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.70 : 1,735.20 = 959.94 : x
  2. Step 2: Convert to fraction form
    1,258.70/1,735.20 = 959.94/x
  3. Step 3: Cross multiply
    1,258.70x = 1,735.20 × 959.94
  4. Step 4: Simplify right side
    1,258.70x = 1,665,687.89
  5. Step 5: Solve for x
    x = 1,665,687.89/1,258.70
  6. Step 6: Final answer
    x = 1,323.35

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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.