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Finding the Fourth Proportional to 343,385.60, 515,078.40 and 217,414.40

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Solution

The fourth proportional to 343,385.60, 515,078.40 and 217,414.40 is: 326,121.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,385.60 : 515,078.40 = 217,414.40 : x
  2. Step 2: Convert to fraction form
    343,385.60/515,078.40 = 217,414.40/x
  3. Step 3: Cross multiply
    343,385.60x = 515,078.40 × 217,414.40
  4. Step 4: Simplify right side
    343,385.60x = 111,985,461,288.96
  5. Step 5: Solve for x
    x = 111,985,461,288.96/343,385.60
  6. Step 6: Final answer
    x = 326,121.60

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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.