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Finding the Fourth Proportional to 228,652.80, 342,979.20 and 215,822.40

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Solution

The fourth proportional to 228,652.80, 342,979.20 and 215,822.40 is: 323,733.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,652.80 : 342,979.20 = 215,822.40 : x
  2. Step 2: Convert to fraction form
    228,652.80/342,979.20 = 215,822.40/x
  3. Step 3: Cross multiply
    228,652.80x = 342,979.20 × 215,822.40
  4. Step 4: Simplify right side
    228,652.80x = 74,022,594,094.08
  5. Step 5: Solve for x
    x = 74,022,594,094.08/228,652.80
  6. Step 6: Final answer
    x = 323,733.60

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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.