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Finding the Fourth Proportional to 308,911.63, 426,171.36 and 187,955.95

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Solution

The fourth proportional to 308,911.63, 426,171.36 and 187,955.95 is: 259,302.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,911.63 : 426,171.36 = 187,955.95 : x
  2. Step 2: Convert to fraction form
    308,911.63/426,171.36 = 187,955.95/x
  3. Step 3: Cross multiply
    308,911.63x = 426,171.36 × 187,955.95
  4. Step 4: Simplify right side
    308,911.63x = 80,101,442,831.59
  5. Step 5: Solve for x
    x = 80,101,442,831.59/308,911.63
  6. Step 6: Final answer
    x = 259,302.13

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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.