Home / 815,721.40-1,223,582.10-343,329.40

Finding the Fourth Proportional to 815,721.40, 1,223,582.10 and 343,329.40

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Solution

The fourth proportional to 815,721.40, 1,223,582.10 and 343,329.40 is: 514,994.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,721.40 : 1,223,582.10 = 343,329.40 : x
  2. Step 2: Convert to fraction form
    815,721.40/1,223,582.10 = 343,329.40/x
  3. Step 3: Cross multiply
    815,721.40x = 1,223,582.10 × 343,329.40
  4. Step 4: Simplify right side
    815,721.40x = 420,091,708,243.74
  5. Step 5: Solve for x
    x = 420,091,708,243.74/815,721.40
  6. Step 6: Final answer
    x = 514,994.10

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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.