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Finding the Fourth Proportional to 1,258.97, 1,887.78 and 528.35

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Solution

The fourth proportional to 1,258.97, 1,887.78 and 528.35 is: 792.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.97 : 1,887.78 = 528.35 : x
  2. Step 2: Convert to fraction form
    1,258.97/1,887.78 = 528.35/x
  3. Step 3: Cross multiply
    1,258.97x = 1,887.78 × 528.35
  4. Step 4: Simplify right side
    1,258.97x = 997,408.56
  5. Step 5: Solve for x
    x = 997,408.56/1,258.97
  6. Step 6: Final answer
    x = 792.24

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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.