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Finding the Fourth Proportional to 310,338.87, 428,349.50 and 183,099.21

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Solution

The fourth proportional to 310,338.87, 428,349.50 and 183,099.21 is: 252,725.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,338.87 : 428,349.50 = 183,099.21 : x
  2. Step 2: Convert to fraction form
    310,338.87/428,349.50 = 183,099.21/x
  3. Step 3: Cross multiply
    310,338.87x = 428,349.50 × 183,099.21
  4. Step 4: Simplify right side
    310,338.87x = 78,430,455,053.90
  5. Step 5: Solve for x
    x = 78,430,455,053.90/310,338.87
  6. Step 6: Final answer
    x = 252,725.21

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1.5x scale

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.