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Finding the Fourth Proportional to 636,384.80, 878,126.52 and 394,579.16

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Solution

The fourth proportional to 636,384.80, 878,126.52 and 394,579.16 is: 544,466.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,384.80 : 878,126.52 = 394,579.16 : x
  2. Step 2: Convert to fraction form
    636,384.80/878,126.52 = 394,579.16/x
  3. Step 3: Cross multiply
    636,384.80x = 878,126.52 × 394,579.16
  4. Step 4: Simplify right side
    636,384.80x = 346,490,424,635.32
  5. Step 5: Solve for x
    x = 346,490,424,635.32/636,384.80
  6. Step 6: Final answer
    x = 544,466.85

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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.