Home / 413,221.20-619,763.76-386,322.72

Finding the Fourth Proportional to 413,221.20, 619,763.76 and 386,322.72

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Solution

The fourth proportional to 413,221.20, 619,763.76 and 386,322.72 is: 579,420.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,221.20 : 619,763.76 = 386,322.72 : x
  2. Step 2: Convert to fraction form
    413,221.20/619,763.76 = 386,322.72/x
  3. Step 3: Cross multiply
    413,221.20x = 619,763.76 × 386,322.72
  4. Step 4: Simplify right side
    413,221.20x = 239,428,821,520.63
  5. Step 5: Solve for x
    x = 239,428,821,520.63/413,221.20
  6. Step 6: Final answer
    x = 579,420.47

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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.