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Finding the Fourth Proportional to 640,049.45, 960,070.71 and 260,968.72

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Solution

The fourth proportional to 640,049.45, 960,070.71 and 260,968.72 is: 391,451.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,049.45 : 960,070.71 = 260,968.72 : x
  2. Step 2: Convert to fraction form
    640,049.45/960,070.71 = 260,968.72/x
  3. Step 3: Cross multiply
    640,049.45x = 960,070.71 × 260,968.72
  4. Step 4: Simplify right side
    640,049.45x = 250,548,419,497.84
  5. Step 5: Solve for x
    x = 250,548,419,497.84/640,049.45
  6. Step 6: Final answer
    x = 391,451.66

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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.