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Finding the Fourth Proportional to 1,258.60, 1,888.44 and 819.04

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Solution

The fourth proportional to 1,258.60, 1,888.44 and 819.04 is: 1,228.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.60 : 1,888.44 = 819.04 : x
  2. Step 2: Convert to fraction form
    1,258.60/1,888.44 = 819.04/x
  3. Step 3: Cross multiply
    1,258.60x = 1,888.44 × 819.04
  4. Step 4: Simplify right side
    1,258.60x = 1,546,707.90
  5. Step 5: Solve for x
    x = 1,546,707.90/1,258.60
  6. Step 6: Final answer
    x = 1,228.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.