Home / 1,298.50-1,947.81-324.61

Finding the Fourth Proportional to 1,298.50, 1,947.81 and 324.61

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Solution

The fourth proportional to 1,298.50, 1,947.81 and 324.61 is: 486.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.50 : 1,947.81 = 324.61 : x
  2. Step 2: Convert to fraction form
    1,298.50/1,947.81 = 324.61/x
  3. Step 3: Cross multiply
    1,298.50x = 1,947.81 × 324.61
  4. Step 4: Simplify right side
    1,298.50x = 632,278.60
  5. Step 5: Solve for x
    x = 632,278.60/1,298.50
  6. Step 6: Final answer
    x = 486.93

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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.