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Finding the Fourth Proportional to 640,751.11, 960,652.13 and 387,972.18

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Solution

The fourth proportional to 640,751.11, 960,652.13 and 387,972.18 is: 581,670.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,751.11 : 960,652.13 = 387,972.18 : x
  2. Step 2: Convert to fraction form
    640,751.11/960,652.13 = 387,972.18/x
  3. Step 3: Cross multiply
    640,751.11x = 960,652.13 × 387,972.18
  4. Step 4: Simplify right side
    640,751.11x = 372,706,299,157.88
  5. Step 5: Solve for x
    x = 372,706,299,157.88/640,751.11
  6. Step 6: Final answer
    x = 581,670.94

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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.