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Finding the Fourth Proportional to 391,504.66, 540,314.35 and 219,451.85

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Solution

The fourth proportional to 391,504.66, 540,314.35 and 219,451.85 is: 302,864.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,504.66 : 540,314.35 = 219,451.85 : x
  2. Step 2: Convert to fraction form
    391,504.66/540,314.35 = 219,451.85/x
  3. Step 3: Cross multiply
    391,504.66x = 540,314.35 × 219,451.85
  4. Step 4: Simplify right side
    391,504.66x = 118,572,982,465.03
  5. Step 5: Solve for x
    x = 118,572,982,465.03/391,504.66
  6. Step 6: Final answer
    x = 302,864.81

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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.