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Finding the Fourth Proportional to 1,298.62, 1,947.88 and 324.72

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Solution

The fourth proportional to 1,298.62, 1,947.88 and 324.72 is: 487.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.62 : 1,947.88 = 324.72 : x
  2. Step 2: Convert to fraction form
    1,298.62/1,947.88 = 324.72/x
  3. Step 3: Cross multiply
    1,298.62x = 1,947.88 × 324.72
  4. Step 4: Simplify right side
    1,298.62x = 632,515.59
  5. Step 5: Solve for x
    x = 632,515.59/1,298.62
  6. Step 6: Final answer
    x = 487.07

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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.