Home / 386,415.24-579,789.72-209,047.20

Finding the Fourth Proportional to 386,415.24, 579,789.72 and 209,047.20

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Solution

The fourth proportional to 386,415.24, 579,789.72 and 209,047.20 is: 313,661.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,415.24 : 579,789.72 = 209,047.20 : x
  2. Step 2: Convert to fraction form
    386,415.24/579,789.72 = 209,047.20/x
  3. Step 3: Cross multiply
    386,415.24x = 579,789.72 × 209,047.20
  4. Step 4: Simplify right side
    386,415.24x = 121,203,417,554.78
  5. Step 5: Solve for x
    x = 121,203,417,554.78/386,415.24
  6. Step 6: Final answer
    x = 313,661.07

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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.