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Finding the Fourth Proportional to 636,309.28, 878,112.71 and 349,831.38

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Solution

The fourth proportional to 636,309.28, 878,112.71 and 349,831.38 is: 482,770.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,309.28 : 878,112.71 = 349,831.38 : x
  2. Step 2: Convert to fraction form
    636,309.28/878,112.71 = 349,831.38/x
  3. Step 3: Cross multiply
    636,309.28x = 878,112.71 × 349,831.38
  4. Step 4: Simplify right side
    636,309.28x = 307,191,381,134.84
  5. Step 5: Solve for x
    x = 307,191,381,134.84/636,309.28
  6. Step 6: Final answer
    x = 482,770.55

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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.