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Finding the Fourth Proportional to 324,928.40, 487,219.80 and 137,728.40

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Solution

The fourth proportional to 324,928.40, 487,219.80 and 137,728.40 is: 206,519.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,928.40 : 487,219.80 = 137,728.40 : x
  2. Step 2: Convert to fraction form
    324,928.40/487,219.80 = 137,728.40/x
  3. Step 3: Cross multiply
    324,928.40x = 487,219.80 × 137,728.40
  4. Step 4: Simplify right side
    324,928.40x = 67,104,003,502.32
  5. Step 5: Solve for x
    x = 67,104,003,502.32/324,928.40
  6. Step 6: Final answer
    x = 206,519.35

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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.