Home / 391,631.22-540,477.81-221,866.74

Finding the Fourth Proportional to 391,631.22, 540,477.81 and 221,866.74

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Solution

The fourth proportional to 391,631.22, 540,477.81 and 221,866.74 is: 306,191.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,631.22 : 540,477.81 = 221,866.74 : x
  2. Step 2: Convert to fraction form
    391,631.22/540,477.81 = 221,866.74/x
  3. Step 3: Cross multiply
    391,631.22x = 540,477.81 × 221,866.74
  4. Step 4: Simplify right side
    391,631.22x = 119,914,049,747.04
  5. Step 5: Solve for x
    x = 119,914,049,747.04/391,631.22
  6. Step 6: Final answer
    x = 306,191.24

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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.