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Finding the Fourth Proportional to 661,187.56, 912,440.10 and 359,380.84

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Solution

The fourth proportional to 661,187.56, 912,440.10 and 359,380.84 is: 495,946.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,187.56 : 912,440.10 = 359,380.84 : x
  2. Step 2: Convert to fraction form
    661,187.56/912,440.10 = 359,380.84/x
  3. Step 3: Cross multiply
    661,187.56x = 912,440.10 × 359,380.84
  4. Step 4: Simplify right side
    661,187.56x = 327,913,489,587.68
  5. Step 5: Solve for x
    x = 327,913,489,587.68/661,187.56
  6. Step 6: Final answer
    x = 495,946.25

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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.