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Finding the Fourth Proportional to 397,406.60, 548,143.12 and 261,397.07

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Solution

The fourth proportional to 397,406.60, 548,143.12 and 261,397.07 is: 360,545.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,406.60 : 548,143.12 = 261,397.07 : x
  2. Step 2: Convert to fraction form
    397,406.60/548,143.12 = 261,397.07/x
  3. Step 3: Cross multiply
    397,406.60x = 548,143.12 × 261,397.07
  4. Step 4: Simplify right side
    397,406.60x = 143,283,002,114.45
  5. Step 5: Solve for x
    x = 143,283,002,114.45/397,406.60
  6. Step 6: Final answer
    x = 360,545.10

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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.