Home / 457,917.80-686,876.70-289,956.20

Finding the Fourth Proportional to 457,917.80, 686,876.70 and 289,956.20

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Solution

The fourth proportional to 457,917.80, 686,876.70 and 289,956.20 is: 434,934.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,917.80 : 686,876.70 = 289,956.20 : x
  2. Step 2: Convert to fraction form
    457,917.80/686,876.70 = 289,956.20/x
  3. Step 3: Cross multiply
    457,917.80x = 686,876.70 × 289,956.20
  4. Step 4: Simplify right side
    457,917.80x = 199,164,157,800.54
  5. Step 5: Solve for x
    x = 199,164,157,800.54/457,917.80
  6. Step 6: Final answer
    x = 434,934.30

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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.