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Finding the Fourth Proportional to 279,296.50, 385,425.93 and 151,969.90

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Solution

The fourth proportional to 279,296.50, 385,425.93 and 151,969.90 is: 209,716.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,296.50 : 385,425.93 = 151,969.90 : x
  2. Step 2: Convert to fraction form
    279,296.50/385,425.93 = 151,969.90/x
  3. Step 3: Cross multiply
    279,296.50x = 385,425.93 × 151,969.90
  4. Step 4: Simplify right side
    279,296.50x = 58,573,140,039.51
  5. Step 5: Solve for x
    x = 58,573,140,039.51/279,296.50
  6. Step 6: Final answer
    x = 209,716.70

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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.