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Finding the Fourth Proportional to 343,885.20, 516,216.60 and 265,347.60

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Solution

The fourth proportional to 343,885.20, 516,216.60 and 265,347.60 is: 398,321.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,885.20 : 516,216.60 = 265,347.60 : x
  2. Step 2: Convert to fraction form
    343,885.20/516,216.60 = 265,347.60/x
  3. Step 3: Cross multiply
    343,885.20x = 516,216.60 × 265,347.60
  4. Step 4: Simplify right side
    343,885.20x = 136,976,835,890.16
  5. Step 5: Solve for x
    x = 136,976,835,890.16/343,885.20
  6. Step 6: Final answer
    x = 398,321.40

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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.