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Finding the Fourth Proportional to 1,258.76, 1,888.82 and 528.85

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Solution

The fourth proportional to 1,258.76, 1,888.82 and 528.85 is: 793.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.76 : 1,888.82 = 528.85 : x
  2. Step 2: Convert to fraction form
    1,258.76/1,888.82 = 528.85/x
  3. Step 3: Cross multiply
    1,258.76x = 1,888.82 × 528.85
  4. Step 4: Simplify right side
    1,258.76x = 998,893.53
  5. Step 5: Solve for x
    x = 998,893.53/1,258.76
  6. Step 6: Final answer
    x = 793.56

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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.