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Finding the Fourth Proportional to 636,291.64, 878,078.10 and 349,804.36

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Solution

The fourth proportional to 636,291.64, 878,078.10 and 349,804.36 is: 482,727.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,291.64 : 878,078.10 = 349,804.36 : x
  2. Step 2: Convert to fraction form
    636,291.64/878,078.10 = 349,804.36/x
  3. Step 3: Cross multiply
    636,291.64x = 878,078.10 × 349,804.36
  4. Step 4: Simplify right side
    636,291.64x = 307,155,547,800.52
  5. Step 5: Solve for x
    x = 307,155,547,800.52/636,291.64
  6. Step 6: Final answer
    x = 482,727.62

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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.