Home / 402,474.69-555,425.28-221,191.23

Finding the Fourth Proportional to 402,474.69, 555,425.28 and 221,191.23

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Solution

The fourth proportional to 402,474.69, 555,425.28 and 221,191.23 is: 305,249.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,474.69 : 555,425.28 = 221,191.23 : x
  2. Step 2: Convert to fraction form
    402,474.69/555,425.28 = 221,191.23/x
  3. Step 3: Cross multiply
    402,474.69x = 555,425.28 × 221,191.23
  4. Step 4: Simplify right side
    402,474.69x = 122,855,200,856.29
  5. Step 5: Solve for x
    x = 122,855,200,856.29/402,474.69
  6. Step 6: Final answer
    x = 305,249.51

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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.