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Finding the Fourth Proportional to 1,173,324, 1,619,187.12 and 636,780

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Solution

The fourth proportional to 1,173,324, 1,619,187.12 and 636,780 is: 878,756.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173,324 : 1,619,187.12 = 636,780 : x
  2. Step 2: Convert to fraction form
    1,173,324/1,619,187.12 = 636,780/x
  3. Step 3: Cross multiply
    1,173,324x = 1,619,187.12 × 636,780
  4. Step 4: Simplify right side
    1,173,324x = 1,031,065,974,273.60
  5. Step 5: Solve for x
    x = 1,031,065,974,273.60/1,173,324
  6. Step 6: Final answer
    x = 878,756.40

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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.