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Finding the Fourth Proportional to 260,776.80, 391,640.40 and 228,117.60

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Solution

The fourth proportional to 260,776.80, 391,640.40 and 228,117.60 is: 342,592.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,776.80 : 391,640.40 = 228,117.60 : x
  2. Step 2: Convert to fraction form
    260,776.80/391,640.40 = 228,117.60/x
  3. Step 3: Cross multiply
    260,776.80x = 391,640.40 × 228,117.60
  4. Step 4: Simplify right side
    260,776.80x = 89,340,068,111.04
  5. Step 5: Solve for x
    x = 89,340,068,111.04/260,776.80
  6. Step 6: Final answer
    x = 342,592.09

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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.