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Finding the Fourth Proportional to 636,118.49, 878,048.43 and 407,291.87

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Solution

The fourth proportional to 636,118.49, 878,048.43 and 407,291.87 is: 562,193.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,118.49 : 878,048.43 = 407,291.87 : x
  2. Step 2: Convert to fraction form
    636,118.49/878,048.43 = 407,291.87/x
  3. Step 3: Cross multiply
    636,118.49x = 878,048.43 × 407,291.87
  4. Step 4: Simplify right side
    636,118.49x = 357,621,987,005.26
  5. Step 5: Solve for x
    x = 357,621,987,005.26/636,118.49
  6. Step 6: Final answer
    x = 562,193.98

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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.