Home / 873,115.20-1,309,672.80-768,139.20

Finding the Fourth Proportional to 873,115.20, 1,309,672.80 and 768,139.20

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Solution

The fourth proportional to 873,115.20, 1,309,672.80 and 768,139.20 is: 1,152,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,115.20 : 1,309,672.80 = 768,139.20 : x
  2. Step 2: Convert to fraction form
    873,115.20/1,309,672.80 = 768,139.20/x
  3. Step 3: Cross multiply
    873,115.20x = 1,309,672.80 × 768,139.20
  4. Step 4: Simplify right side
    873,115.20x = 1,006,011,016,853.76
  5. Step 5: Solve for x
    x = 1,006,011,016,853.76/873,115.20
  6. Step 6: Final answer
    x = 1,152,208.80

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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.