Home / 320,371.20-442,405.80-257,171.76

Finding the Fourth Proportional to 320,371.20, 442,405.80 and 257,171.76

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Solution

The fourth proportional to 320,371.20, 442,405.80 and 257,171.76 is: 355,132.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,371.20 : 442,405.80 = 257,171.76 : x
  2. Step 2: Convert to fraction form
    320,371.20/442,405.80 = 257,171.76/x
  3. Step 3: Cross multiply
    320,371.20x = 442,405.80 × 257,171.76
  4. Step 4: Simplify right side
    320,371.20x = 113,774,278,220.21
  5. Step 5: Solve for x
    x = 113,774,278,220.21/320,371.20
  6. Step 6: Final answer
    x = 355,132.67

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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.