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Finding the Fourth Proportional to 420,258.42, 579,933 and 239,014.44

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Solution

The fourth proportional to 420,258.42, 579,933 and 239,014.44 is: 329,826.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,258.42 : 579,933 = 239,014.44 : x
  2. Step 2: Convert to fraction form
    420,258.42/579,933 = 239,014.44/x
  3. Step 3: Cross multiply
    420,258.42x = 579,933 × 239,014.44
  4. Step 4: Simplify right side
    420,258.42x = 138,612,361,232.52
  5. Step 5: Solve for x
    x = 138,612,361,232.52/420,258.42
  6. Step 6: Final answer
    x = 329,826.49

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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.