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Finding the Fourth Proportional to 636,886.49, 878,910.32 and 346,499.70

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Solution

The fourth proportional to 636,886.49, 878,910.32 and 346,499.70 is: 478,173.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,886.49 : 878,910.32 = 346,499.70 : x
  2. Step 2: Convert to fraction form
    636,886.49/878,910.32 = 346,499.70/x
  3. Step 3: Cross multiply
    636,886.49x = 878,910.32 × 346,499.70
  4. Step 4: Simplify right side
    636,886.49x = 304,542,163,073.15
  5. Step 5: Solve for x
    x = 304,542,163,073.15/636,886.49
  6. Step 6: Final answer
    x = 478,173.38

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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.