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Finding the Fourth Proportional to 391,227.42, 539,900.69 and 219,143.89

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Solution

The fourth proportional to 391,227.42, 539,900.69 and 219,143.89 is: 302,422.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,227.42 : 539,900.69 = 219,143.89 : x
  2. Step 2: Convert to fraction form
    391,227.42/539,900.69 = 219,143.89/x
  3. Step 3: Cross multiply
    391,227.42x = 539,900.69 × 219,143.89
  4. Step 4: Simplify right side
    391,227.42x = 118,315,937,420.28
  5. Step 5: Solve for x
    x = 118,315,937,420.28/391,227.42
  6. Step 6: Final answer
    x = 302,422.41

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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.