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Finding the Fourth Proportional to 403,640.20, 605,411.70 and 166,958.20

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Solution

The fourth proportional to 403,640.20, 605,411.70 and 166,958.20 is: 250,417.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,640.20 : 605,411.70 = 166,958.20 : x
  2. Step 2: Convert to fraction form
    403,640.20/605,411.70 = 166,958.20/x
  3. Step 3: Cross multiply
    403,640.20x = 605,411.70 × 166,958.20
  4. Step 4: Simplify right side
    403,640.20x = 101,078,447,690.94
  5. Step 5: Solve for x
    x = 101,078,447,690.94/403,640.20
  6. Step 6: Final answer
    x = 250,417.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.