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Finding the Fourth Proportional to 368,461.60, 551,380.20 and 255,612.40

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Solution

The fourth proportional to 368,461.60, 551,380.20 and 255,612.40 is: 382,508.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,461.60 : 551,380.20 = 255,612.40 : x
  2. Step 2: Convert to fraction form
    368,461.60/551,380.20 = 255,612.40/x
  3. Step 3: Cross multiply
    368,461.60x = 551,380.20 × 255,612.40
  4. Step 4: Simplify right side
    368,461.60x = 140,939,616,234.48
  5. Step 5: Solve for x
    x = 140,939,616,234.48/368,461.60
  6. Step 6: Final answer
    x = 382,508.29

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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.