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Finding the Fourth Proportional to 279,831.40, 419,747.10 and 153,860.20

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Solution

The fourth proportional to 279,831.40, 419,747.10 and 153,860.20 is: 230,790.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,831.40 : 419,747.10 = 153,860.20 : x
  2. Step 2: Convert to fraction form
    279,831.40/419,747.10 = 153,860.20/x
  3. Step 3: Cross multiply
    279,831.40x = 419,747.10 × 153,860.20
  4. Step 4: Simplify right side
    279,831.40x = 64,582,372,755.42
  5. Step 5: Solve for x
    x = 64,582,372,755.42/279,831.40
  6. Step 6: Final answer
    x = 230,790.30

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1.5x scale

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.