Home / 1,248,686.28-1,722,765.24-812,905.20

Finding the Fourth Proportional to 1,248,686.28, 1,722,765.24 and 812,905.20

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Solution

The fourth proportional to 1,248,686.28, 1,722,765.24 and 812,905.20 is: 1,121,534.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248,686.28 : 1,722,765.24 = 812,905.20 : x
  2. Step 2: Convert to fraction form
    1,248,686.28/1,722,765.24 = 812,905.20/x
  3. Step 3: Cross multiply
    1,248,686.28x = 1,722,765.24 × 812,905.20
  4. Step 4: Simplify right side
    1,248,686.28x = 1,400,444,821,975.25
  5. Step 5: Solve for x
    x = 1,400,444,821,975.25/1,248,686.28
  6. Step 6: Final answer
    x = 1,121,534.56

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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.