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Finding the Fourth Proportional to 661,186.56, 912,438.72 and 359,379.84

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Solution

The fourth proportional to 661,186.56, 912,438.72 and 359,379.84 is: 495,944.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,186.56 : 912,438.72 = 359,379.84 : x
  2. Step 2: Convert to fraction form
    661,186.56/912,438.72 = 359,379.84/x
  3. Step 3: Cross multiply
    661,186.56x = 912,438.72 × 359,379.84
  4. Step 4: Simplify right side
    661,186.56x = 327,912,081,203.41
  5. Step 5: Solve for x
    x = 327,912,081,203.41/661,186.56
  6. Step 6: Final answer
    x = 495,944.87

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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.