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Finding the Fourth Proportional to 391,369.46, 540,081.99 and 219,285.36

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Solution

The fourth proportional to 391,369.46, 540,081.99 and 219,285.36 is: 302,609.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,369.46 : 540,081.99 = 219,285.36 : x
  2. Step 2: Convert to fraction form
    391,369.46/540,081.99 = 219,285.36/x
  3. Step 3: Cross multiply
    391,369.46x = 540,081.99 × 219,285.36
  4. Step 4: Simplify right side
    391,369.46x = 118,432,073,606.67
  5. Step 5: Solve for x
    x = 118,432,073,606.67/391,369.46
  6. Step 6: Final answer
    x = 302,609.39

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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.