Home / 391,055.02-539,667.30-221,285.50

Finding the Fourth Proportional to 391,055.02, 539,667.30 and 221,285.50

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Solution

The fourth proportional to 391,055.02, 539,667.30 and 221,285.50 is: 305,380.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,055.02 : 539,667.30 = 221,285.50 : x
  2. Step 2: Convert to fraction form
    391,055.02/539,667.30 = 221,285.50/x
  3. Step 3: Cross multiply
    391,055.02x = 539,667.30 × 221,285.50
  4. Step 4: Simplify right side
    391,055.02x = 119,420,548,314.15
  5. Step 5: Solve for x
    x = 119,420,548,314.15/391,055.02
  6. Step 6: Final answer
    x = 305,380.43

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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.