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Finding the Fourth Proportional to 515,655.45, 772,691.94 and 215,972.01

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Solution

The fourth proportional to 515,655.45, 772,691.94 and 215,972.01 is: 323,626.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,655.45 : 772,691.94 = 215,972.01 : x
  2. Step 2: Convert to fraction form
    515,655.45/772,691.94 = 215,972.01/x
  3. Step 3: Cross multiply
    515,655.45x = 772,691.94 × 215,972.01
  4. Step 4: Simplify right side
    515,655.45x = 166,879,831,392.60
  5. Step 5: Solve for x
    x = 166,879,831,392.60/515,655.45
  6. Step 6: Final answer
    x = 323,626.62

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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.