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Finding the Fourth Proportional to 228,740.80, 343,111.20 and 215,910.40

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Solution

The fourth proportional to 228,740.80, 343,111.20 and 215,910.40 is: 323,865.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,740.80 : 343,111.20 = 215,910.40 : x
  2. Step 2: Convert to fraction form
    228,740.80/343,111.20 = 215,910.40/x
  3. Step 3: Cross multiply
    228,740.80x = 343,111.20 × 215,910.40
  4. Step 4: Simplify right side
    228,740.80x = 74,081,276,436.48
  5. Step 5: Solve for x
    x = 74,081,276,436.48/228,740.80
  6. Step 6: Final answer
    x = 323,865.60

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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.