Home / 398,823.45-550,579.53-307,975.47

Finding the Fourth Proportional to 398,823.45, 550,579.53 and 307,975.47

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Solution

The fourth proportional to 398,823.45, 550,579.53 and 307,975.47 is: 425,163.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,823.45 : 550,579.53 = 307,975.47 : x
  2. Step 2: Convert to fraction form
    398,823.45/550,579.53 = 307,975.47/x
  3. Step 3: Cross multiply
    398,823.45x = 550,579.53 × 307,975.47
  4. Step 4: Simplify right side
    398,823.45x = 169,564,986,882.00
  5. Step 5: Solve for x
    x = 169,564,986,882.00/398,823.45
  6. Step 6: Final answer
    x = 425,163.04

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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.