Home / 686,711.88-1,029,880.44-287,287.92

Finding the Fourth Proportional to 686,711.88, 1,029,880.44 and 287,287.92

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Solution

The fourth proportional to 686,711.88, 1,029,880.44 and 287,287.92 is: 430,853.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,711.88 : 1,029,880.44 = 287,287.92 : x
  2. Step 2: Convert to fraction form
    686,711.88/1,029,880.44 = 287,287.92/x
  3. Step 3: Cross multiply
    686,711.88x = 1,029,880.44 × 287,287.92
  4. Step 4: Simplify right side
    686,711.88x = 295,872,209,456.29
  5. Step 5: Solve for x
    x = 295,872,209,456.29/686,711.88
  6. Step 6: Final answer
    x = 430,853.49

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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.