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Finding the Third Proportional to 280,378.50 and 615,039

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Solution

The third proportional to 280,378.50 and 615,039 is: 1,349,151.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,378.50 : 615,039 = 615,039 : x
  2. Step 2: Convert to fraction form
    280,378.50/615,039 = 615,039/x
  3. Step 3: Cross multiply
    280,378.50x = 615,039 × 615,039
  4. Step 4: Simplify right side
    280,378.50x = 378,272,971,521
  5. Step 5: Solve for x
    x = 378,272,971,521/280,378.50
  6. Step 6: Final answer
    x = 1,349,151.14

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.