Home / 386,726.20-580,526.70-209,141.80

Finding the Fourth Proportional to 386,726.20, 580,526.70 and 209,141.80

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Solution

The fourth proportional to 386,726.20, 580,526.70 and 209,141.80 is: 313,949.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,726.20 : 580,526.70 = 209,141.80 : x
  2. Step 2: Convert to fraction form
    386,726.20/580,526.70 = 209,141.80/x
  3. Step 3: Cross multiply
    386,726.20x = 580,526.70 × 209,141.80
  4. Step 4: Simplify right side
    386,726.20x = 121,412,398,986.06
  5. Step 5: Solve for x
    x = 121,412,398,986.06/386,726.20
  6. Step 6: Final answer
    x = 313,949.25

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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.