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Finding the Fourth Proportional to 1,324,216.86, 1,985,821.11 and 784,625.40

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Solution

The fourth proportional to 1,324,216.86, 1,985,821.11 and 784,625.40 is: 1,176,639.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324,216.86 : 1,985,821.11 = 784,625.40 : x
  2. Step 2: Convert to fraction form
    1,324,216.86/1,985,821.11 = 784,625.40/x
  3. Step 3: Cross multiply
    1,324,216.86x = 1,985,821.11 × 784,625.40
  4. Step 4: Simplify right side
    1,324,216.86x = 1,558,125,689,688.31
  5. Step 5: Solve for x
    x = 1,558,125,689,688.31/1,324,216.86
  6. Step 6: Final answer
    x = 1,176,639.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.