Home / 815,640.20-1,223,897.70-342,373.40

Finding the Fourth Proportional to 815,640.20, 1,223,897.70 and 342,373.40

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Solution

The fourth proportional to 815,640.20, 1,223,897.70 and 342,373.40 is: 513,743.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,640.20 : 1,223,897.70 = 342,373.40 : x
  2. Step 2: Convert to fraction form
    815,640.20/1,223,897.70 = 342,373.40/x
  3. Step 3: Cross multiply
    815,640.20x = 1,223,897.70 × 342,373.40
  4. Step 4: Simplify right side
    815,640.20x = 419,030,016,801.18
  5. Step 5: Solve for x
    x = 419,030,016,801.18/815,640.20
  6. Step 6: Final answer
    x = 513,743.70

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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.