Home / 1,385,720.40-2,079,271.80-787,141.20

Finding the Fourth Proportional to 1,385,720.40, 2,079,271.80 and 787,141.20

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Solution

The fourth proportional to 1,385,720.40, 2,079,271.80 and 787,141.20 is: 1,181,104.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,720.40 : 2,079,271.80 = 787,141.20 : x
  2. Step 2: Convert to fraction form
    1,385,720.40/2,079,271.80 = 787,141.20/x
  3. Step 3: Cross multiply
    1,385,720.40x = 2,079,271.80 × 787,141.20
  4. Step 4: Simplify right side
    1,385,720.40x = 1,636,680,499,778.16
  5. Step 5: Solve for x
    x = 1,636,680,499,778.16/1,385,720.40
  6. Step 6: Final answer
    x = 1,181,104.43

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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.