Home / 402,665.22-555,678.36-221,380.24

Finding the Fourth Proportional to 402,665.22, 555,678.36 and 221,380.24

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Solution

The fourth proportional to 402,665.22, 555,678.36 and 221,380.24 is: 305,504.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,665.22 : 555,678.36 = 221,380.24 : x
  2. Step 2: Convert to fraction form
    402,665.22/555,678.36 = 221,380.24/x
  3. Step 3: Cross multiply
    402,665.22x = 555,678.36 × 221,380.24
  4. Step 4: Simplify right side
    402,665.22x = 123,016,205,921.22
  5. Step 5: Solve for x
    x = 123,016,205,921.22/402,665.22
  6. Step 6: Final answer
    x = 305,504.92

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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.