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Finding the Fourth Proportional to 340,430.80, 509,771.40 and 251,201.20

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Solution

The fourth proportional to 340,430.80, 509,771.40 and 251,201.20 is: 376,156.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,430.80 : 509,771.40 = 251,201.20 : x
  2. Step 2: Convert to fraction form
    340,430.80/509,771.40 = 251,201.20/x
  3. Step 3: Cross multiply
    340,430.80x = 509,771.40 × 251,201.20
  4. Step 4: Simplify right side
    340,430.80x = 128,055,187,405.68
  5. Step 5: Solve for x
    x = 128,055,187,405.68/340,430.80
  6. Step 6: Final answer
    x = 376,156.29

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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.