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Finding the Fourth Proportional to 405,011.91, 558,920.76 and 223,728.66

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Solution

The fourth proportional to 405,011.91, 558,920.76 and 223,728.66 is: 308,747.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,011.91 : 558,920.76 = 223,728.66 : x
  2. Step 2: Convert to fraction form
    405,011.91/558,920.76 = 223,728.66/x
  3. Step 3: Cross multiply
    405,011.91x = 558,920.76 × 223,728.66
  4. Step 4: Simplify right side
    405,011.91x = 125,046,592,680.98
  5. Step 5: Solve for x
    x = 125,046,592,680.98/405,011.91
  6. Step 6: Final answer
    x = 308,747.94

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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.