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Finding the Fourth Proportional to 661,394.28, 912,755.34 and 374,919.96

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Solution

The fourth proportional to 661,394.28, 912,755.34 and 374,919.96 is: 517,407.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,394.28 : 912,755.34 = 374,919.96 : x
  2. Step 2: Convert to fraction form
    661,394.28/912,755.34 = 374,919.96/x
  3. Step 3: Cross multiply
    661,394.28x = 912,755.34 × 374,919.96
  4. Step 4: Simplify right side
    661,394.28x = 342,210,195,562.59
  5. Step 5: Solve for x
    x = 342,210,195,562.59/661,394.28
  6. Step 6: Final answer
    x = 517,407.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.