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Finding the Fourth Proportional to 402,617.76, 555,619.58 and 221,337.32

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Solution

The fourth proportional to 402,617.76, 555,619.58 and 221,337.32 is: 305,449.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,617.76 : 555,619.58 = 221,337.32 : x
  2. Step 2: Convert to fraction form
    402,617.76/555,619.58 = 221,337.32/x
  3. Step 3: Cross multiply
    402,617.76x = 555,619.58 × 221,337.32
  4. Step 4: Simplify right side
    402,617.76x = 122,979,348,776.73
  5. Step 5: Solve for x
    x = 122,979,348,776.73/402,617.76
  6. Step 6: Final answer
    x = 305,449.39

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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.