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Finding the Fourth Proportional to 391,204.50, 539,875.48 and 219,129.84

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Solution

The fourth proportional to 391,204.50, 539,875.48 and 219,129.84 is: 302,406.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,204.50 : 539,875.48 = 219,129.84 : x
  2. Step 2: Convert to fraction form
    391,204.50/539,875.48 = 219,129.84/x
  3. Step 3: Cross multiply
    391,204.50x = 539,875.48 × 219,129.84
  4. Step 4: Simplify right side
    391,204.50x = 118,302,827,552.32
  5. Step 5: Solve for x
    x = 118,302,827,552.32/391,204.50
  6. Step 6: Final answer
    x = 302,406.61

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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.