Home / 413,205.20-619,739.76-386,306.72

Finding the Fourth Proportional to 413,205.20, 619,739.76 and 386,306.72

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Solution

The fourth proportional to 413,205.20, 619,739.76 and 386,306.72 is: 579,396.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,205.20 : 619,739.76 = 386,306.72 : x
  2. Step 2: Convert to fraction form
    413,205.20/619,739.76 = 386,306.72/x
  3. Step 3: Cross multiply
    413,205.20x = 619,739.76 × 386,306.72
  4. Step 4: Simplify right side
    413,205.20x = 239,409,633,939.19
  5. Step 5: Solve for x
    x = 239,409,633,939.19/413,205.20
  6. Step 6: Final answer
    x = 579,396.47

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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.