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Finding the Fourth Proportional to 402,656.06, 555,651.20 and 221,366.68

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Solution

The fourth proportional to 402,656.06, 555,651.20 and 221,366.68 is: 305,478.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,656.06 : 555,651.20 = 221,366.68 : x
  2. Step 2: Convert to fraction form
    402,656.06/555,651.20 = 221,366.68/x
  3. Step 3: Cross multiply
    402,656.06x = 555,651.20 × 221,366.68
  4. Step 4: Simplify right side
    402,656.06x = 123,002,660,546.31
  5. Step 5: Solve for x
    x = 123,002,660,546.31/402,656.06
  6. Step 6: Final answer
    x = 305,478.23

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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.