Home / 815,744.76-1,223,647.89-310,211.51

Finding the Fourth Proportional to 815,744.76, 1,223,647.89 and 310,211.51

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Solution

The fourth proportional to 815,744.76, 1,223,647.89 and 310,211.51 is: 465,328.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,744.76 : 1,223,647.89 = 310,211.51 : x
  2. Step 2: Convert to fraction form
    815,744.76/1,223,647.89 = 310,211.51/x
  3. Step 3: Cross multiply
    815,744.76x = 1,223,647.89 × 310,211.51
  4. Step 4: Simplify right side
    815,744.76x = 379,589,653,546.97
  5. Step 5: Solve for x
    x = 379,589,653,546.97/815,744.76
  6. Step 6: Final answer
    x = 465,328.95

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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.