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Finding the Fourth Proportional to 265,607.20, 398,401.20 and 107,831.20

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Solution

The fourth proportional to 265,607.20, 398,401.20 and 107,831.20 is: 161,742.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,607.20 : 398,401.20 = 107,831.20 : x
  2. Step 2: Convert to fraction form
    265,607.20/398,401.20 = 107,831.20/x
  3. Step 3: Cross multiply
    265,607.20x = 398,401.20 × 107,831.20
  4. Step 4: Simplify right side
    265,607.20x = 42,960,079,477.44
  5. Step 5: Solve for x
    x = 42,960,079,477.44/265,607.20
  6. Step 6: Final answer
    x = 161,742.90

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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.