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Finding the Fourth Proportional to 636,421.94, 878,286.88 and 349,935.87

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Solution

The fourth proportional to 636,421.94, 878,286.88 and 349,935.87 is: 482,925.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,421.94 : 878,286.88 = 349,935.87 : x
  2. Step 2: Convert to fraction form
    636,421.94/878,286.88 = 349,935.87/x
  3. Step 3: Cross multiply
    636,421.94x = 878,286.88 × 349,935.87
  4. Step 4: Simplify right side
    636,421.94x = 307,344,083,462.39
  5. Step 5: Solve for x
    x = 307,344,083,462.39/636,421.94
  6. Step 6: Final answer
    x = 482,925.03

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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.