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Finding the Fourth Proportional to 1,210,340.07, 1,815,794.42 and 678,228.39

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Solution

The fourth proportional to 1,210,340.07, 1,815,794.42 and 678,228.39 is: 1,017,501.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,340.07 : 1,815,794.42 = 678,228.39 : x
  2. Step 2: Convert to fraction form
    1,210,340.07/1,815,794.42 = 678,228.39/x
  3. Step 3: Cross multiply
    1,210,340.07x = 1,815,794.42 × 678,228.39
  4. Step 4: Simplify right side
    1,210,340.07x = 1,231,523,322,656.44
  5. Step 5: Solve for x
    x = 1,231,523,322,656.44/1,210,340.07
  6. Step 6: Final answer
    x = 1,017,501.90

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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.