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Finding the Fourth Proportional to 402,481.16, 555,397.10 and 221,189.20

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Solution

The fourth proportional to 402,481.16, 555,397.10 and 221,189.20 is: 305,226.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,481.16 : 555,397.10 = 221,189.20 : x
  2. Step 2: Convert to fraction form
    402,481.16/555,397.10 = 221,189.20/x
  3. Step 3: Cross multiply
    402,481.16x = 555,397.10 × 221,189.20
  4. Step 4: Simplify right side
    402,481.16x = 122,847,840,231.32
  5. Step 5: Solve for x
    x = 122,847,840,231.32/402,481.16
  6. Step 6: Final answer
    x = 305,226.31

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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.