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Finding the Fourth Proportional to 640,887.65, 961,386.36 and 167,572.25

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Solution

The fourth proportional to 640,887.65, 961,386.36 and 167,572.25 is: 251,372.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,887.65 : 961,386.36 = 167,572.25 : x
  2. Step 2: Convert to fraction form
    640,887.65/961,386.36 = 167,572.25/x
  3. Step 3: Cross multiply
    640,887.65x = 961,386.36 × 167,572.25
  4. Step 4: Simplify right side
    640,887.65x = 161,101,675,464.51
  5. Step 5: Solve for x
    x = 161,101,675,464.51/640,887.65
  6. Step 6: Final answer
    x = 251,372.73

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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.