Home / 1,387,861.61-1,915,656.29-807,221.31

Finding the Fourth Proportional to 1,387,861.61, 1,915,656.29 and 807,221.31

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Solution

The fourth proportional to 1,387,861.61, 1,915,656.29 and 807,221.31 is: 1,114,202.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,861.61 : 1,915,656.29 = 807,221.31 : x
  2. Step 2: Convert to fraction form
    1,387,861.61/1,915,656.29 = 807,221.31/x
  3. Step 3: Cross multiply
    1,387,861.61x = 1,915,656.29 × 807,221.31
  4. Step 4: Simplify right side
    1,387,861.61x = 1,546,358,579,923.54
  5. Step 5: Solve for x
    x = 1,546,358,579,923.54/1,387,861.61
  6. Step 6: Final answer
    x = 1,114,202.29

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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.