Home / 325,928.80-489,476.40-315,431.20

Finding the Fourth Proportional to 325,928.80, 489,476.40 and 315,431.20

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Solution

The fourth proportional to 325,928.80, 489,476.40 and 315,431.20 is: 473,711.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,928.80 : 489,476.40 = 315,431.20 : x
  2. Step 2: Convert to fraction form
    325,928.80/489,476.40 = 315,431.20/x
  3. Step 3: Cross multiply
    325,928.80x = 489,476.40 × 315,431.20
  4. Step 4: Simplify right side
    325,928.80x = 154,396,128,223.68
  5. Step 5: Solve for x
    x = 154,396,128,223.68/325,928.80
  6. Step 6: Final answer
    x = 473,711.22

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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.