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Finding the Fourth Proportional to 287,760.60, 431,640.90 and 228,274.20

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Solution

The fourth proportional to 287,760.60, 431,640.90 and 228,274.20 is: 342,411.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,760.60 : 431,640.90 = 228,274.20 : x
  2. Step 2: Convert to fraction form
    287,760.60/431,640.90 = 228,274.20/x
  3. Step 3: Cross multiply
    287,760.60x = 431,640.90 × 228,274.20
  4. Step 4: Simplify right side
    287,760.60x = 98,532,481,134.78
  5. Step 5: Solve for x
    x = 98,532,481,134.78/287,760.60
  6. Step 6: Final answer
    x = 342,411.30

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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.