Home / 1,387,125.80-2,080,688.70-722,191.40

Finding the Fourth Proportional to 1,387,125.80, 2,080,688.70 and 722,191.40

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Solution

The fourth proportional to 1,387,125.80, 2,080,688.70 and 722,191.40 is: 1,083,287.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,125.80 : 2,080,688.70 = 722,191.40 : x
  2. Step 2: Convert to fraction form
    1,387,125.80/2,080,688.70 = 722,191.40/x
  3. Step 3: Cross multiply
    1,387,125.80x = 2,080,688.70 × 722,191.40
  4. Step 4: Simplify right side
    1,387,125.80x = 1,502,655,485,217.18
  5. Step 5: Solve for x
    x = 1,502,655,485,217.18/1,387,125.80
  6. Step 6: Final answer
    x = 1,083,287.10

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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.