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Finding the Fourth Proportional to 636,688.77, 878,612.17 and 350,208.85

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Solution

The fourth proportional to 636,688.77, 878,612.17 and 350,208.85 is: 483,278.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,688.77 : 878,612.17 = 350,208.85 : x
  2. Step 2: Convert to fraction form
    636,688.77/878,612.17 = 350,208.85/x
  3. Step 3: Cross multiply
    636,688.77x = 878,612.17 × 350,208.85
  4. Step 4: Simplify right side
    636,688.77x = 307,697,757,651.70
  5. Step 5: Solve for x
    x = 307,697,757,651.70/636,688.77
  6. Step 6: Final answer
    x = 483,278.13

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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.