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Finding the Fourth Proportional to 1,258.85, 1,736.90 and 734.91

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Solution

The fourth proportional to 1,258.85, 1,736.90 and 734.91 is: 1,013.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.85 : 1,736.90 = 734.91 : x
  2. Step 2: Convert to fraction form
    1,258.85/1,736.90 = 734.91/x
  3. Step 3: Cross multiply
    1,258.85x = 1,736.90 × 734.91
  4. Step 4: Simplify right side
    1,258.85x = 1,276,461.50
  5. Step 5: Solve for x
    x = 1,276,461.50/1,258.85
  6. Step 6: Final answer
    x = 1,013.99

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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.