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Finding the Fourth Proportional to 1,258.60, 1,887.60 and 528.18

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Solution

The fourth proportional to 1,258.60, 1,887.60 and 528.18 is: 792.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.60 : 1,887.60 = 528.18 : x
  2. Step 2: Convert to fraction form
    1,258.60/1,887.60 = 528.18/x
  3. Step 3: Cross multiply
    1,258.60x = 1,887.60 × 528.18
  4. Step 4: Simplify right side
    1,258.60x = 996,992.57
  5. Step 5: Solve for x
    x = 996,992.57/1,258.60
  6. Step 6: Final answer
    x = 792.14

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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.