Home / 443,831.56-665,721.34-128,281.48

Finding the Fourth Proportional to 443,831.56, 665,721.34 and 128,281.48

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Solution

The fourth proportional to 443,831.56, 665,721.34 and 128,281.48 is: 192,414.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,831.56 : 665,721.34 = 128,281.48 : x
  2. Step 2: Convert to fraction form
    443,831.56/665,721.34 = 128,281.48/x
  3. Step 3: Cross multiply
    443,831.56x = 665,721.34 × 128,281.48
  4. Step 4: Simplify right side
    443,831.56x = 85,399,718,762.78
  5. Step 5: Solve for x
    x = 85,399,718,762.78/443,831.56
  6. Step 6: Final answer
    x = 192,414.71

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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.