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Finding the Fourth Proportional to 391,095.54, 539,698.14 and 221,326.02

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Solution

The fourth proportional to 391,095.54, 539,698.14 and 221,326.02 is: 305,422.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,095.54 : 539,698.14 = 221,326.02 : x
  2. Step 2: Convert to fraction form
    391,095.54/539,698.14 = 221,326.02/x
  3. Step 3: Cross multiply
    391,095.54x = 539,698.14 × 221,326.02
  4. Step 4: Simplify right side
    391,095.54x = 119,449,241,327.60
  5. Step 5: Solve for x
    x = 119,449,241,327.60/391,095.54
  6. Step 6: Final answer
    x = 305,422.15

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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.