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Finding the Fourth Proportional to 661,004.72, 912,186.60 and 359,198

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Solution

The fourth proportional to 661,004.72, 912,186.60 and 359,198 is: 495,693.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,004.72 : 912,186.60 = 359,198 : x
  2. Step 2: Convert to fraction form
    661,004.72/912,186.60 = 359,198/x
  3. Step 3: Cross multiply
    661,004.72x = 912,186.60 × 359,198
  4. Step 4: Simplify right side
    661,004.72x = 327,655,602,346.80
  5. Step 5: Solve for x
    x = 327,655,602,346.80/661,004.72
  6. Step 6: Final answer
    x = 495,693.29

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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.