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Finding the Fourth Proportional to 402,718.44, 555,765.72 and 221,444.16

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Solution

The fourth proportional to 402,718.44, 555,765.72 and 221,444.16 is: 305,600.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,718.44 : 555,765.72 = 221,444.16 : x
  2. Step 2: Convert to fraction form
    402,718.44/555,765.72 = 221,444.16/x
  3. Step 3: Cross multiply
    402,718.44x = 555,765.72 × 221,444.16
  4. Step 4: Simplify right side
    402,718.44x = 123,071,073,022.20
  5. Step 5: Solve for x
    x = 123,071,073,022.20/402,718.44
  6. Step 6: Final answer
    x = 305,600.79

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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.