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Finding the Fourth Proportional to 290,334.28, 399,831.78 and 261,407.56

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Solution

The fourth proportional to 290,334.28, 399,831.78 and 261,407.56 is: 359,995.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,334.28 : 399,831.78 = 261,407.56 : x
  2. Step 2: Convert to fraction form
    290,334.28/399,831.78 = 261,407.56/x
  3. Step 3: Cross multiply
    290,334.28x = 399,831.78 × 261,407.56
  4. Step 4: Simplify right side
    290,334.28x = 104,519,050,020.26
  5. Step 5: Solve for x
    x = 104,519,050,020.26/290,334.28
  6. Step 6: Final answer
    x = 359,995.55

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1.5x scale

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.