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Finding the Fourth Proportional to 636,116.88, 878,045.86 and 407,290.52

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Solution

The fourth proportional to 636,116.88, 878,045.86 and 407,290.52 is: 562,191.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,116.88 : 878,045.86 = 407,290.52 : x
  2. Step 2: Convert to fraction form
    636,116.88/878,045.86 = 407,290.52/x
  3. Step 3: Cross multiply
    636,116.88x = 878,045.86 × 407,290.52
  4. Step 4: Simplify right side
    636,116.88x = 357,619,754,903.25
  5. Step 5: Solve for x
    x = 357,619,754,903.25/636,116.88
  6. Step 6: Final answer
    x = 562,191.90

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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.