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Finding the Fourth Proportional to 636,385.80, 878,227.43 and 346,013.97

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Solution

The fourth proportional to 636,385.80, 878,227.43 and 346,013.97 is: 477,507.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,385.80 : 878,227.43 = 346,013.97 : x
  2. Step 2: Convert to fraction form
    636,385.80/878,227.43 = 346,013.97/x
  3. Step 3: Cross multiply
    636,385.80x = 878,227.43 × 346,013.97
  4. Step 4: Simplify right side
    636,385.80x = 303,878,959,617.20
  5. Step 5: Solve for x
    x = 303,878,959,617.20/636,385.80
  6. Step 6: Final answer
    x = 477,507.45

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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.