Home / 1,210,520.20-1,815,780.30-738,128.20

Finding the Fourth Proportional to 1,210,520.20, 1,815,780.30 and 738,128.20

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Solution

The fourth proportional to 1,210,520.20, 1,815,780.30 and 738,128.20 is: 1,107,192.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,520.20 : 1,815,780.30 = 738,128.20 : x
  2. Step 2: Convert to fraction form
    1,210,520.20/1,815,780.30 = 738,128.20/x
  3. Step 3: Cross multiply
    1,210,520.20x = 1,815,780.30 × 738,128.20
  4. Step 4: Simplify right side
    1,210,520.20x = 1,340,278,644,434.46
  5. Step 5: Solve for x
    x = 1,340,278,644,434.46/1,210,520.20
  6. Step 6: Final answer
    x = 1,107,192.30

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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.