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Finding the Third Proportional to 515,142.28 and 757,280.39

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Solution

The third proportional to 515,142.28 and 757,280.39 is: 1,113,233.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,142.28 : 757,280.39 = 757,280.39 : x
  2. Step 2: Convert to fraction form
    515,142.28/757,280.39 = 757,280.39/x
  3. Step 3: Cross multiply
    515,142.28x = 757,280.39 × 757,280.39
  4. Step 4: Simplify right side
    515,142.28x = 573,473,590,025.15
  5. Step 5: Solve for x
    x = 573,473,590,025.15/515,142.28
  6. Step 6: Final answer
    x = 1,113,233.39

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.