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Finding the Fourth Proportional to 305,808.68, 422,013.06 and 171,671.72

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Solution

The fourth proportional to 305,808.68, 422,013.06 and 171,671.72 is: 236,905.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,808.68 : 422,013.06 = 171,671.72 : x
  2. Step 2: Convert to fraction form
    305,808.68/422,013.06 = 171,671.72/x
  3. Step 3: Cross multiply
    305,808.68x = 422,013.06 × 171,671.72
  4. Step 4: Simplify right side
    305,808.68x = 72,447,707,872.66
  5. Step 5: Solve for x
    x = 72,447,707,872.66/305,808.68
  6. Step 6: Final answer
    x = 236,905.34

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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.