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Finding the Fourth Proportional to 307,422.18, 424,245 and 171,464.76

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Solution

The fourth proportional to 307,422.18, 424,245 and 171,464.76 is: 236,622.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,422.18 : 424,245 = 171,464.76 : x
  2. Step 2: Convert to fraction form
    307,422.18/424,245 = 171,464.76/x
  3. Step 3: Cross multiply
    307,422.18x = 424,245 × 171,464.76
  4. Step 4: Simplify right side
    307,422.18x = 72,743,067,106.20
  5. Step 5: Solve for x
    x = 72,743,067,106.20/307,422.18
  6. Step 6: Final answer
    x = 236,622.70

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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.