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Finding the Fourth Proportional to 340,431.80, 509,772.90 and 251,202.20

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Solution

The fourth proportional to 340,431.80, 509,772.90 and 251,202.20 is: 376,157.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,431.80 : 509,772.90 = 251,202.20 : x
  2. Step 2: Convert to fraction form
    340,431.80/509,772.90 = 251,202.20/x
  3. Step 3: Cross multiply
    340,431.80x = 509,772.90 × 251,202.20
  4. Step 4: Simplify right side
    340,431.80x = 128,056,073,980.38
  5. Step 5: Solve for x
    x = 128,056,073,980.38/340,431.80
  6. Step 6: Final answer
    x = 376,157.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.