Home / 420,286.20-579,964.86-229,295.40

Finding the Fourth Proportional to 420,286.20, 579,964.86 and 229,295.40

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Solution

The fourth proportional to 420,286.20, 579,964.86 and 229,295.40 is: 316,411.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,286.20 : 579,964.86 = 229,295.40 : x
  2. Step 2: Convert to fraction form
    420,286.20/579,964.86 = 229,295.40/x
  3. Step 3: Cross multiply
    420,286.20x = 579,964.86 × 229,295.40
  4. Step 4: Simplify right side
    420,286.20x = 132,983,274,559.64
  5. Step 5: Solve for x
    x = 132,983,274,559.64/420,286.20
  6. Step 6: Final answer
    x = 316,411.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.