Home / 402,476.18-555,390.22-221,184.20

Finding the Fourth Proportional to 402,476.18, 555,390.22 and 221,184.20

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Solution

The fourth proportional to 402,476.18, 555,390.22 and 221,184.20 is: 305,219.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,476.18 : 555,390.22 = 221,184.20 : x
  2. Step 2: Convert to fraction form
    402,476.18/555,390.22 = 221,184.20/x
  3. Step 3: Cross multiply
    402,476.18x = 555,390.22 × 221,184.20
  4. Step 4: Simplify right side
    402,476.18x = 122,843,542,748.76
  5. Step 5: Solve for x
    x = 122,843,542,748.76/402,476.18
  6. Step 6: Final answer
    x = 305,219.42

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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.