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Finding the Fourth Proportional to 660,697.28, 911,737.87 and 358,884.80

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Solution

The fourth proportional to 660,697.28, 911,737.87 and 358,884.80 is: 495,247.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,697.28 : 911,737.87 = 358,884.80 : x
  2. Step 2: Convert to fraction form
    660,697.28/911,737.87 = 358,884.80/x
  3. Step 3: Cross multiply
    660,697.28x = 911,737.87 × 358,884.80
  4. Step 4: Simplify right side
    660,697.28x = 327,208,858,568.69
  5. Step 5: Solve for x
    x = 327,208,858,568.69/660,697.28
  6. Step 6: Final answer
    x = 495,247.78

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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.