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Finding the Fourth Proportional to 640,957.48, 961,362.78 and 167,688.52

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Solution

The fourth proportional to 640,957.48, 961,362.78 and 167,688.52 is: 251,513.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,957.48 : 961,362.78 = 167,688.52 : x
  2. Step 2: Convert to fraction form
    640,957.48/961,362.78 = 167,688.52/x
  3. Step 3: Cross multiply
    640,957.48x = 961,362.78 × 167,688.52
  4. Step 4: Simplify right side
    640,957.48x = 161,209,501,761.29
  5. Step 5: Solve for x
    x = 161,209,501,761.29/640,957.48
  6. Step 6: Final answer
    x = 251,513.57

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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.