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Finding the Fourth Proportional to 1,210,978.25, 1,816,723.74 and 357,982.64

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Solution

The fourth proportional to 1,210,978.25, 1,816,723.74 and 357,982.64 is: 537,049.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,978.25 : 1,816,723.74 = 357,982.64 : x
  2. Step 2: Convert to fraction form
    1,210,978.25/1,816,723.74 = 357,982.64/x
  3. Step 3: Cross multiply
    1,210,978.25x = 1,816,723.74 × 357,982.64
  4. Step 4: Simplify right side
    1,210,978.25x = 650,355,560,595.87
  5. Step 5: Solve for x
    x = 650,355,560,595.87/1,210,978.25
  6. Step 6: Final answer
    x = 537,049.75

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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.