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Finding the Fourth Proportional to 391,518.68, 540,333.66 and 219,465.86

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Solution

The fourth proportional to 391,518.68, 540,333.66 and 219,465.86 is: 302,884.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,518.68 : 540,333.66 = 219,465.86 : x
  2. Step 2: Convert to fraction form
    391,518.68/540,333.66 = 219,465.86/x
  3. Step 3: Cross multiply
    391,518.68x = 540,333.66 × 219,465.86
  4. Step 4: Simplify right side
    391,518.68x = 118,584,791,378.85
  5. Step 5: Solve for x
    x = 118,584,791,378.85/391,518.68
  6. Step 6: Final answer
    x = 302,884.12

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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.