Home / 728,749.85-1,005,154.25-631,780.43

Finding the Fourth Proportional to 728,749.85, 1,005,154.25 and 631,780.43

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Solution

The fourth proportional to 728,749.85, 1,005,154.25 and 631,780.43 is: 871,405.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,749.85 : 1,005,154.25 = 631,780.43 : x
  2. Step 2: Convert to fraction form
    728,749.85/1,005,154.25 = 631,780.43/x
  3. Step 3: Cross multiply
    728,749.85x = 1,005,154.25 × 631,780.43
  4. Step 4: Simplify right side
    728,749.85x = 635,036,776,096.65
  5. Step 5: Solve for x
    x = 635,036,776,096.65/728,749.85
  6. Step 6: Final answer
    x = 871,405.71

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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.