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Finding the Fourth Proportional to 636,387.72, 878,218.36 and 349,926.28

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Solution

The fourth proportional to 636,387.72, 878,218.36 and 349,926.28 is: 482,900.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,387.72 : 878,218.36 = 349,926.28 : x
  2. Step 2: Convert to fraction form
    636,387.72/878,218.36 = 349,926.28/x
  3. Step 3: Cross multiply
    636,387.72x = 878,218.36 × 349,926.28
  4. Step 4: Simplify right side
    636,387.72x = 307,311,683,742.50
  5. Step 5: Solve for x
    x = 307,311,683,742.50/636,387.72
  6. Step 6: Final answer
    x = 482,900.08

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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.