Home / 1,281,127.08-1,921,769.73-428,275.38

Finding the Fourth Proportional to 1,281,127.08, 1,921,769.73 and 428,275.38

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Solution

The fourth proportional to 1,281,127.08, 1,921,769.73 and 428,275.38 is: 642,439.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,127.08 : 1,921,769.73 = 428,275.38 : x
  2. Step 2: Convert to fraction form
    1,281,127.08/1,921,769.73 = 428,275.38/x
  3. Step 3: Cross multiply
    1,281,127.08x = 1,921,769.73 × 428,275.38
  4. Step 4: Simplify right side
    1,281,127.08x = 823,046,661,388.25
  5. Step 5: Solve for x
    x = 823,046,661,388.25/1,281,127.08
  6. Step 6: Final answer
    x = 642,439.52

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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.