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Finding the Fourth Proportional to 422,651.71, 583,319.16 and 261,558.66

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Solution

The fourth proportional to 422,651.71, 583,319.16 and 261,558.66 is: 360,987.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,651.71 : 583,319.16 = 261,558.66 : x
  2. Step 2: Convert to fraction form
    422,651.71/583,319.16 = 261,558.66/x
  3. Step 3: Cross multiply
    422,651.71x = 583,319.16 × 261,558.66
  4. Step 4: Simplify right side
    422,651.71x = 152,572,177,841.93
  5. Step 5: Solve for x
    x = 152,572,177,841.93/422,651.71
  6. Step 6: Final answer
    x = 360,987.96

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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.