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Finding the Fourth Proportional to 636,372.12, 878,193.60 and 349,911.60

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Solution

The fourth proportional to 636,372.12, 878,193.60 and 349,911.60 is: 482,878.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,372.12 : 878,193.60 = 349,911.60 : x
  2. Step 2: Convert to fraction form
    636,372.12/878,193.60 = 349,911.60/x
  3. Step 3: Cross multiply
    636,372.12x = 878,193.60 × 349,911.60
  4. Step 4: Simplify right side
    636,372.12x = 307,290,127,685.76
  5. Step 5: Solve for x
    x = 307,290,127,685.76/636,372.12
  6. Step 6: Final answer
    x = 482,878.05

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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.