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Finding the Fourth Proportional to 640,877, 884,395.68 and 354,399.44

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Solution

The fourth proportional to 640,877, 884,395.68 and 354,399.44 is: 489,063.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,877 : 884,395.68 = 354,399.44 : x
  2. Step 2: Convert to fraction form
    640,877/884,395.68 = 354,399.44/x
  3. Step 3: Cross multiply
    640,877x = 884,395.68 × 354,399.44
  4. Step 4: Simplify right side
    640,877x = 313,429,333,730.42
  5. Step 5: Solve for x
    x = 313,429,333,730.42/640,877
  6. Step 6: Final answer
    x = 489,063.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.