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Finding the Third Proportional to 393,909.75 and 608,332.50

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Solution

The third proportional to 393,909.75 and 608,332.50 is: 939,475.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,909.75 : 608,332.50 = 608,332.50 : x
  2. Step 2: Convert to fraction form
    393,909.75/608,332.50 = 608,332.50/x
  3. Step 3: Cross multiply
    393,909.75x = 608,332.50 × 608,332.50
  4. Step 4: Simplify right side
    393,909.75x = 370,068,430,556.25
  5. Step 5: Solve for x
    x = 370,068,430,556.25/393,909.75
  6. Step 6: Final answer
    x = 939,475.17

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.