Home / 1,355.25-2,031.65-489.36

Finding the Fourth Proportional to 1,355.25, 2,031.65 and 489.36

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Solution

The fourth proportional to 1,355.25, 2,031.65 and 489.36 is: 733.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.25 : 2,031.65 = 489.36 : x
  2. Step 2: Convert to fraction form
    1,355.25/2,031.65 = 489.36/x
  3. Step 3: Cross multiply
    1,355.25x = 2,031.65 × 489.36
  4. Step 4: Simplify right side
    1,355.25x = 994,205.80
  5. Step 5: Solve for x
    x = 994,205.80/1,355.25
  6. Step 6: Final answer
    x = 733.60

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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.