Home / 487,943.20-731,569.20-221,831.20

Finding the Fourth Proportional to 487,943.20, 731,569.20 and 221,831.20

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Solution

The fourth proportional to 487,943.20, 731,569.20 and 221,831.20 is: 332,589.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,943.20 : 731,569.20 = 221,831.20 : x
  2. Step 2: Convert to fraction form
    487,943.20/731,569.20 = 221,831.20/x
  3. Step 3: Cross multiply
    487,943.20x = 731,569.20 × 221,831.20
  4. Step 4: Simplify right side
    487,943.20x = 162,284,873,519.04
  5. Step 5: Solve for x
    x = 162,284,873,519.04/487,943.20
  6. Step 6: Final answer
    x = 332,589.68

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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.