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Finding the Fourth Proportional to 640,047.45, 960,067.71 and 260,966.72

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Solution

The fourth proportional to 640,047.45, 960,067.71 and 260,966.72 is: 391,448.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,047.45 : 960,067.71 = 260,966.72 : x
  2. Step 2: Convert to fraction form
    640,047.45/960,067.71 = 260,966.72/x
  3. Step 3: Cross multiply
    640,047.45x = 960,067.71 × 260,966.72
  4. Step 4: Simplify right side
    640,047.45x = 250,545,716,456.27
  5. Step 5: Solve for x
    x = 250,545,716,456.27/640,047.45
  6. Step 6: Final answer
    x = 391,448.66

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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.