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Finding the Fourth Proportional to 636,730.84, 878,394.54 and 381,639.16

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Solution

The fourth proportional to 636,730.84, 878,394.54 and 381,639.16 is: 526,485.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,730.84 : 878,394.54 = 381,639.16 : x
  2. Step 2: Convert to fraction form
    636,730.84/878,394.54 = 381,639.16/x
  3. Step 3: Cross multiply
    636,730.84x = 878,394.54 × 381,639.16
  4. Step 4: Simplify right side
    636,730.84x = 335,229,754,394.19
  5. Step 5: Solve for x
    x = 335,229,754,394.19/636,730.84
  6. Step 6: Final answer
    x = 526,485.81

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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.