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Finding the Fourth Proportional to 636,685.84, 878,612.02 and 350,199.78

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Solution

The fourth proportional to 636,685.84, 878,612.02 and 350,199.78 is: 483,267.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,685.84 : 878,612.02 = 350,199.78 : x
  2. Step 2: Convert to fraction form
    636,685.84/878,612.02 = 350,199.78/x
  3. Step 3: Cross multiply
    636,685.84x = 878,612.02 × 350,199.78
  4. Step 4: Simplify right side
    636,685.84x = 307,689,736,109.36
  5. Step 5: Solve for x
    x = 307,689,736,109.36/636,685.84
  6. Step 6: Final answer
    x = 483,267.75

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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.