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Finding the Fourth Proportional to 305,888.70, 422,114.68 and 169,931.20

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Solution

The fourth proportional to 305,888.70, 422,114.68 and 169,931.20 is: 234,498.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,888.70 : 422,114.68 = 169,931.20 : x
  2. Step 2: Convert to fraction form
    305,888.70/422,114.68 = 169,931.20/x
  3. Step 3: Cross multiply
    305,888.70x = 422,114.68 × 169,931.20
  4. Step 4: Simplify right side
    305,888.70x = 71,730,454,110.02
  5. Step 5: Solve for x
    x = 71,730,454,110.02/305,888.70
  6. Step 6: Final answer
    x = 234,498.54

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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.