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Finding the Fourth Proportional to 324,687.60, 487,031.40 and 265,638.60

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Solution

The fourth proportional to 324,687.60, 487,031.40 and 265,638.60 is: 398,457.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,687.60 : 487,031.40 = 265,638.60 : x
  2. Step 2: Convert to fraction form
    324,687.60/487,031.40 = 265,638.60/x
  3. Step 3: Cross multiply
    324,687.60x = 487,031.40 × 265,638.60
  4. Step 4: Simplify right side
    324,687.60x = 129,374,339,252.04
  5. Step 5: Solve for x
    x = 129,374,339,252.04/324,687.60
  6. Step 6: Final answer
    x = 398,457.90

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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.