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Finding the Fourth Proportional to 440,945, 661,417.50 and 108,521

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Solution

The fourth proportional to 440,945, 661,417.50 and 108,521 is: 162,781.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,945 : 661,417.50 = 108,521 : x
  2. Step 2: Convert to fraction form
    440,945/661,417.50 = 108,521/x
  3. Step 3: Cross multiply
    440,945x = 661,417.50 × 108,521
  4. Step 4: Simplify right side
    440,945x = 71,777,688,517.50
  5. Step 5: Solve for x
    x = 71,777,688,517.50/440,945
  6. Step 6: Final answer
    x = 162,781.50

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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.