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Finding the Fourth Proportional to 254,336.40, 381,504.60 and 76,870.80

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Solution

The fourth proportional to 254,336.40, 381,504.60 and 76,870.80 is: 115,306.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,336.40 : 381,504.60 = 76,870.80 : x
  2. Step 2: Convert to fraction form
    254,336.40/381,504.60 = 76,870.80/x
  3. Step 3: Cross multiply
    254,336.40x = 381,504.60 × 76,870.80
  4. Step 4: Simplify right side
    254,336.40x = 29,326,563,805.68
  5. Step 5: Solve for x
    x = 29,326,563,805.68/254,336.40
  6. Step 6: Final answer
    x = 115,306.20

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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.