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Finding the Fourth Proportional to 268,987.40, 403,364.46 and 91,446.80

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Solution

The fourth proportional to 268,987.40, 403,364.46 and 91,446.80 is: 137,130.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,987.40 : 403,364.46 = 91,446.80 : x
  2. Step 2: Convert to fraction form
    268,987.40/403,364.46 = 91,446.80/x
  3. Step 3: Cross multiply
    268,987.40x = 403,364.46 × 91,446.80
  4. Step 4: Simplify right side
    268,987.40x = 36,886,389,100.73
  5. Step 5: Solve for x
    x = 36,886,389,100.73/268,987.40
  6. Step 6: Final answer
    x = 137,130.55

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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.