Home / 815,657.76-1,223,209.20-310,096.80

Finding the Fourth Proportional to 815,657.76, 1,223,209.20 and 310,096.80

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Solution

The fourth proportional to 815,657.76, 1,223,209.20 and 310,096.80 is: 465,039.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,657.76 : 1,223,209.20 = 310,096.80 : x
  2. Step 2: Convert to fraction form
    815,657.76/1,223,209.20 = 310,096.80/x
  3. Step 3: Cross multiply
    815,657.76x = 1,223,209.20 × 310,096.80
  4. Step 4: Simplify right side
    815,657.76x = 379,313,258,650.56
  5. Step 5: Solve for x
    x = 379,313,258,650.56/815,657.76
  6. Step 6: Final answer
    x = 465,039.72

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1.5x scale

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.