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Finding the Fourth Proportional to 640,175.62, 883,164.82 and 385,379.19

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Solution

The fourth proportional to 640,175.62, 883,164.82 and 385,379.19 is: 531,656.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,175.62 : 883,164.82 = 385,379.19 : x
  2. Step 2: Convert to fraction form
    640,175.62/883,164.82 = 385,379.19/x
  3. Step 3: Cross multiply
    640,175.62x = 883,164.82 × 385,379.19
  4. Step 4: Simplify right side
    640,175.62x = 340,353,342,968.10
  5. Step 5: Solve for x
    x = 340,353,342,968.10/640,175.62
  6. Step 6: Final answer
    x = 531,656.21

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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.