Home / 1,281,071.87-1,921,807.07-427,879.43

Finding the Fourth Proportional to 1,281,071.87, 1,921,807.07 and 427,879.43

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Solution

The fourth proportional to 1,281,071.87, 1,921,807.07 and 427,879.43 is: 641,885.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,071.87 : 1,921,807.07 = 427,879.43 : x
  2. Step 2: Convert to fraction form
    1,281,071.87/1,921,807.07 = 427,879.43/x
  3. Step 3: Cross multiply
    1,281,071.87x = 1,921,807.07 × 427,879.43
  4. Step 4: Simplify right side
    1,281,071.87x = 822,301,701,933.14
  5. Step 5: Solve for x
    x = 822,301,701,933.14/1,281,071.87
  6. Step 6: Final answer
    x = 641,885.69

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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.