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Finding the Fourth Proportional to 815,797.20, 1,223,695.80 and 516,615.60

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Solution

The fourth proportional to 815,797.20, 1,223,695.80 and 516,615.60 is: 774,923.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,797.20 : 1,223,695.80 = 516,615.60 : x
  2. Step 2: Convert to fraction form
    815,797.20/1,223,695.80 = 516,615.60/x
  3. Step 3: Cross multiply
    815,797.20x = 1,223,695.80 × 516,615.60
  4. Step 4: Simplify right side
    815,797.20x = 632,180,339,934.48
  5. Step 5: Solve for x
    x = 632,180,339,934.48/815,797.20
  6. Step 6: Final answer
    x = 774,923.40

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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.