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Finding the Fourth Proportional to 952.50, 1,428.78 and 259.17

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Solution

The fourth proportional to 952.50, 1,428.78 and 259.17 is: 388.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.50 : 1,428.78 = 259.17 : x
  2. Step 2: Convert to fraction form
    952.50/1,428.78 = 259.17/x
  3. Step 3: Cross multiply
    952.50x = 1,428.78 × 259.17
  4. Step 4: Simplify right side
    952.50x = 370,296.91
  5. Step 5: Solve for x
    x = 370,296.91/952.50
  6. Step 6: Final answer
    x = 388.76

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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.