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Finding the Fourth Proportional to 636,431.67, 878,298.30 and 349,973.55

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Solution

The fourth proportional to 636,431.67, 878,298.30 and 349,973.55 is: 482,975.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,431.67 : 878,298.30 = 349,973.55 : x
  2. Step 2: Convert to fraction form
    636,431.67/878,298.30 = 349,973.55/x
  3. Step 3: Cross multiply
    636,431.67x = 878,298.30 × 349,973.55
  4. Step 4: Simplify right side
    636,431.67x = 307,381,174,009.97
  5. Step 5: Solve for x
    x = 307,381,174,009.97/636,431.67
  6. Step 6: Final answer
    x = 482,975.92

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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.