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Finding the Fourth Proportional to 640,847.70, 961,271.55 and 167,580.90

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Solution

The fourth proportional to 640,847.70, 961,271.55 and 167,580.90 is: 251,371.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,847.70 : 961,271.55 = 167,580.90 : x
  2. Step 2: Convert to fraction form
    640,847.70/961,271.55 = 167,580.90/x
  3. Step 3: Cross multiply
    640,847.70x = 961,271.55 × 167,580.90
  4. Step 4: Simplify right side
    640,847.70x = 161,090,751,493.40
  5. Step 5: Solve for x
    x = 161,090,751,493.40/640,847.70
  6. Step 6: Final answer
    x = 251,371.35

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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.