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Finding the Fourth Proportional to 308,890.40, 426,263.31 and 171,066.47

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Solution

The fourth proportional to 308,890.40, 426,263.31 and 171,066.47 is: 236,068.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,890.40 : 426,263.31 = 171,066.47 : x
  2. Step 2: Convert to fraction form
    308,890.40/426,263.31 = 171,066.47/x
  3. Step 3: Cross multiply
    308,890.40x = 426,263.31 × 171,066.47
  4. Step 4: Simplify right side
    308,890.40x = 72,919,357,600.90
  5. Step 5: Solve for x
    x = 72,919,357,600.90/308,890.40
  6. Step 6: Final answer
    x = 236,068.71

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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.