Home / 1,210,144.43-1,670,516.19-861,509.90

Finding the Fourth Proportional to 1,210,144.43, 1,670,516.19 and 861,509.90

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Solution

The fourth proportional to 1,210,144.43, 1,670,516.19 and 861,509.90 is: 1,189,251.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,144.43 : 1,670,516.19 = 861,509.90 : x
  2. Step 2: Convert to fraction form
    1,210,144.43/1,670,516.19 = 861,509.90/x
  3. Step 3: Cross multiply
    1,210,144.43x = 1,670,516.19 × 861,509.90
  4. Step 4: Simplify right side
    1,210,144.43x = 1,439,166,227,442.70
  5. Step 5: Solve for x
    x = 1,439,166,227,442.70/1,210,144.43
  6. Step 6: Final answer
    x = 1,189,251.63

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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.