Home / 428,686.56-643,029.84-148,206.24

Finding the Fourth Proportional to 428,686.56, 643,029.84 and 148,206.24

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Solution

The fourth proportional to 428,686.56, 643,029.84 and 148,206.24 is: 222,309.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,686.56 : 643,029.84 = 148,206.24 : x
  2. Step 2: Convert to fraction form
    428,686.56/643,029.84 = 148,206.24/x
  3. Step 3: Cross multiply
    428,686.56x = 643,029.84 × 148,206.24
  4. Step 4: Simplify right side
    428,686.56x = 95,301,034,794.20
  5. Step 5: Solve for x
    x = 95,301,034,794.20/428,686.56
  6. Step 6: Final answer
    x = 222,309.36

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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.