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Finding the Fourth Proportional to 640,878.40, 961,244.70 and 167,611.60

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Solution

The fourth proportional to 640,878.40, 961,244.70 and 167,611.60 is: 251,398.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,878.40 : 961,244.70 = 167,611.60 : x
  2. Step 2: Convert to fraction form
    640,878.40/961,244.70 = 167,611.60/x
  3. Step 3: Cross multiply
    640,878.40x = 961,244.70 × 167,611.60
  4. Step 4: Simplify right side
    640,878.40x = 161,115,762,158.52
  5. Step 5: Solve for x
    x = 161,115,762,158.52/640,878.40
  6. Step 6: Final answer
    x = 251,398.33

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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.