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Finding the Fourth Proportional to 343,815.20, 516,111.60 and 265,277.60

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Solution

The fourth proportional to 343,815.20, 516,111.60 and 265,277.60 is: 398,216.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,815.20 : 516,111.60 = 265,277.60 : x
  2. Step 2: Convert to fraction form
    343,815.20/516,111.60 = 265,277.60/x
  3. Step 3: Cross multiply
    343,815.20x = 516,111.60 × 265,277.60
  4. Step 4: Simplify right side
    343,815.20x = 136,912,846,580.16
  5. Step 5: Solve for x
    x = 136,912,846,580.16/343,815.20
  6. Step 6: Final answer
    x = 398,216.39

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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.