Home / 386,490.36-579,938.22-280,747.92

Finding the Fourth Proportional to 386,490.36, 579,938.22 and 280,747.92

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Solution

The fourth proportional to 386,490.36, 579,938.22 and 280,747.92 is: 421,269.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,490.36 : 579,938.22 = 280,747.92 : x
  2. Step 2: Convert to fraction form
    386,490.36/579,938.22 = 280,747.92/x
  3. Step 3: Cross multiply
    386,490.36x = 579,938.22 × 280,747.92
  4. Step 4: Simplify right side
    386,490.36x = 162,816,448,993.50
  5. Step 5: Solve for x
    x = 162,816,448,993.50/386,490.36
  6. Step 6: Final answer
    x = 421,269.11

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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.