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Finding the Fourth Proportional to 397,407.22, 548,143.98 and 261,397.69

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Solution

The fourth proportional to 397,407.22, 548,143.98 and 261,397.69 is: 360,545.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,407.22 : 548,143.98 = 261,397.69 : x
  2. Step 2: Convert to fraction form
    397,407.22/548,143.98 = 261,397.69/x
  3. Step 3: Cross multiply
    397,407.22x = 548,143.98 × 261,397.69
  4. Step 4: Simplify right side
    397,407.22x = 143,283,570,159.41
  5. Step 5: Solve for x
    x = 143,283,570,159.41/397,407.22
  6. Step 6: Final answer
    x = 360,545.97

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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.