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Finding the Fourth Proportional to 358,923.99, 495,315.14 and 208,108.47

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Solution

The fourth proportional to 358,923.99, 495,315.14 and 208,108.47 is: 287,189.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,923.99 : 495,315.14 = 208,108.47 : x
  2. Step 2: Convert to fraction form
    358,923.99/495,315.14 = 208,108.47/x
  3. Step 3: Cross multiply
    358,923.99x = 495,315.14 × 208,108.47
  4. Step 4: Simplify right side
    358,923.99x = 103,079,274,912.69
  5. Step 5: Solve for x
    x = 103,079,274,912.69/358,923.99
  6. Step 6: Final answer
    x = 287,189.71

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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.