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Finding the Fourth Proportional to 636,116.49, 878,045.67 and 407,289.87

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Solution

The fourth proportional to 636,116.49, 878,045.67 and 407,289.87 is: 562,191.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,116.49 : 878,045.67 = 407,289.87 : x
  2. Step 2: Convert to fraction form
    636,116.49/878,045.67 = 407,289.87/x
  3. Step 3: Cross multiply
    636,116.49x = 878,045.67 × 407,289.87
  4. Step 4: Simplify right side
    636,116.49x = 357,619,106,788.36
  5. Step 5: Solve for x
    x = 357,619,106,788.36/636,116.49
  6. Step 6: Final answer
    x = 562,191.22

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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.