Home / 1,290,006.69-1,780,164.39-831,140.61

Finding the Fourth Proportional to 1,290,006.69, 1,780,164.39 and 831,140.61

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Solution

The fourth proportional to 1,290,006.69, 1,780,164.39 and 831,140.61 is: 1,146,945.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,006.69 : 1,780,164.39 = 831,140.61 : x
  2. Step 2: Convert to fraction form
    1,290,006.69/1,780,164.39 = 831,140.61/x
  3. Step 3: Cross multiply
    1,290,006.69x = 1,780,164.39 × 831,140.61
  4. Step 4: Simplify right side
    1,290,006.69x = 1,479,566,918,784.30
  5. Step 5: Solve for x
    x = 1,479,566,918,784.30/1,290,006.69
  6. Step 6: Final answer
    x = 1,146,945.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.