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Finding the Fourth Proportional to 1,258.50, 1,887.39 and 528.06

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Solution

The fourth proportional to 1,258.50, 1,887.39 and 528.06 is: 791.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.50 : 1,887.39 = 528.06 : x
  2. Step 2: Convert to fraction form
    1,258.50/1,887.39 = 528.06/x
  3. Step 3: Cross multiply
    1,258.50x = 1,887.39 × 528.06
  4. Step 4: Simplify right side
    1,258.50x = 996,655.16
  5. Step 5: Solve for x
    x = 996,655.16/1,258.50
  6. Step 6: Final answer
    x = 791.94

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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.