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Finding the Fourth Proportional to 402,767.56, 555,800.20 and 221,487.12

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Solution

The fourth proportional to 402,767.56, 555,800.20 and 221,487.12 is: 305,641.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,767.56 : 555,800.20 = 221,487.12 : x
  2. Step 2: Convert to fraction form
    402,767.56/555,800.20 = 221,487.12/x
  3. Step 3: Cross multiply
    402,767.56x = 555,800.20 × 221,487.12
  4. Step 4: Simplify right side
    402,767.56x = 123,102,585,593.42
  5. Step 5: Solve for x
    x = 123,102,585,593.42/402,767.56
  6. Step 6: Final answer
    x = 305,641.76

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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.