Home / 391,631.72-540,478.50-221,867.24

Finding the Fourth Proportional to 391,631.72, 540,478.50 and 221,867.24

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Solution

The fourth proportional to 391,631.72, 540,478.50 and 221,867.24 is: 306,191.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,631.72 : 540,478.50 = 221,867.24 : x
  2. Step 2: Convert to fraction form
    391,631.72/540,478.50 = 221,867.24/x
  3. Step 3: Cross multiply
    391,631.72x = 540,478.50 × 221,867.24
  4. Step 4: Simplify right side
    391,631.72x = 119,914,473,074.34
  5. Step 5: Solve for x
    x = 119,914,473,074.34/391,631.72
  6. Step 6: Final answer
    x = 306,191.93

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1.5x scale

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.