Home / 3,986,411.80-5,980,200.90-1,290,278.20

Finding the Fourth Proportional to 3,986,411.80, 5,980,200.90 and 1,290,278.20

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Solution

The fourth proportional to 3,986,411.80, 5,980,200.90 and 1,290,278.20 is: 1,935,606.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986,411.80 : 5,980,200.90 = 1,290,278.20 : x
  2. Step 2: Convert to fraction form
    3,986,411.80/5,980,200.90 = 1,290,278.20/x
  3. Step 3: Cross multiply
    3,986,411.80x = 5,980,200.90 × 1,290,278.20
  4. Step 4: Simplify right side
    3,986,411.80x = 7,716,122,852,890.38
  5. Step 5: Solve for x
    x = 7,716,122,852,890.38/3,986,411.80
  6. Step 6: Final answer
    x = 1,935,606.06

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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.