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Finding the Fourth Proportional to 343,772.40, 515,658.60 and 272,913.60

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Solution

The fourth proportional to 343,772.40, 515,658.60 and 272,913.60 is: 409,370.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,772.40 : 515,658.60 = 272,913.60 : x
  2. Step 2: Convert to fraction form
    343,772.40/515,658.60 = 272,913.60/x
  3. Step 3: Cross multiply
    343,772.40x = 515,658.60 × 272,913.60
  4. Step 4: Simplify right side
    343,772.40x = 140,730,244,896.96
  5. Step 5: Solve for x
    x = 140,730,244,896.96/343,772.40
  6. Step 6: Final answer
    x = 409,370.40

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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.