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Finding the Fourth Proportional to 391,309.24, 540,020.10 and 219,234.46

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Solution

The fourth proportional to 391,309.24, 540,020.10 and 219,234.46 is: 302,551.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,309.24 : 540,020.10 = 219,234.46 : x
  2. Step 2: Convert to fraction form
    391,309.24/540,020.10 = 219,234.46/x
  3. Step 3: Cross multiply
    391,309.24x = 540,020.10 × 219,234.46
  4. Step 4: Simplify right side
    391,309.24x = 118,391,015,012.65
  5. Step 5: Solve for x
    x = 118,391,015,012.65/391,309.24
  6. Step 6: Final answer
    x = 302,551.03

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1.5x scale

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.