Home / 387,422.24-534,638.69-221,828.24

Finding the Fourth Proportional to 387,422.24, 534,638.69 and 221,828.24

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Solution

The fourth proportional to 387,422.24, 534,638.69 and 221,828.24 is: 306,120.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,422.24 : 534,638.69 = 221,828.24 : x
  2. Step 2: Convert to fraction form
    387,422.24/534,638.69 = 221,828.24/x
  3. Step 3: Cross multiply
    387,422.24x = 534,638.69 × 221,828.24
  4. Step 4: Simplify right side
    387,422.24x = 118,597,955,856.27
  5. Step 5: Solve for x
    x = 118,597,955,856.27/387,422.24
  6. Step 6: Final answer
    x = 306,120.67

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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.