Home / 402,542.12-555,513.22-221,273.80

Finding the Fourth Proportional to 402,542.12, 555,513.22 and 221,273.80

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Solution

The fourth proportional to 402,542.12, 555,513.22 and 221,273.80 is: 305,360.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,542.12 : 555,513.22 = 221,273.80 : x
  2. Step 2: Convert to fraction form
    402,542.12/555,513.22 = 221,273.80/x
  3. Step 3: Cross multiply
    402,542.12x = 555,513.22 × 221,273.80
  4. Step 4: Simplify right side
    402,542.12x = 122,920,521,139.64
  5. Step 5: Solve for x
    x = 122,920,521,139.64/402,542.12
  6. Step 6: Final answer
    x = 305,360.64

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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.