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Finding the Fourth Proportional to 661,163.16, 912,411.18 and 359,357.88

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Solution

The fourth proportional to 661,163.16, 912,411.18 and 359,357.88 is: 495,917.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,163.16 : 912,411.18 = 359,357.88 : x
  2. Step 2: Convert to fraction form
    661,163.16/912,411.18 = 359,357.88/x
  3. Step 3: Cross multiply
    661,163.16x = 912,411.18 × 359,357.88
  4. Step 4: Simplify right side
    661,163.16x = 327,882,147,333.10
  5. Step 5: Solve for x
    x = 327,882,147,333.10/661,163.16
  6. Step 6: Final answer
    x = 495,917.15

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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.