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Finding the Fourth Proportional to 636,464.94, 878,291.55 and 349,997.10

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Solution

The fourth proportional to 636,464.94, 878,291.55 and 349,997.10 is: 482,979.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,464.94 : 878,291.55 = 349,997.10 : x
  2. Step 2: Convert to fraction form
    636,464.94/878,291.55 = 349,997.10/x
  3. Step 3: Cross multiply
    636,464.94x = 878,291.55 × 349,997.10
  4. Step 4: Simplify right side
    636,464.94x = 307,399,495,454.51
  5. Step 5: Solve for x
    x = 307,399,495,454.51/636,464.94
  6. Step 6: Final answer
    x = 482,979.46

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Double scale
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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.