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Finding the Fourth Proportional to 640,972.84, 960,781.28 and 241,440.74

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Solution

The fourth proportional to 640,972.84, 960,781.28 and 241,440.74 is: 361,905.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,972.84 : 960,781.28 = 241,440.74 : x
  2. Step 2: Convert to fraction form
    640,972.84/960,781.28 = 241,440.74/x
  3. Step 3: Cross multiply
    640,972.84x = 960,781.28 × 241,440.74
  4. Step 4: Simplify right side
    640,972.84x = 231,971,743,221.35
  5. Step 5: Solve for x
    x = 231,971,743,221.35/640,972.84
  6. Step 6: Final answer
    x = 361,905.73

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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.