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Finding the Fourth Proportional to 455,210.31, 628,190.29 and 251,261.30

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Solution

The fourth proportional to 455,210.31, 628,190.29 and 251,261.30 is: 346,740.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,210.31 : 628,190.29 = 251,261.30 : x
  2. Step 2: Convert to fraction form
    455,210.31/628,190.29 = 251,261.30/x
  3. Step 3: Cross multiply
    455,210.31x = 628,190.29 × 251,261.30
  4. Step 4: Simplify right side
    455,210.31x = 157,839,905,143.67
  5. Step 5: Solve for x
    x = 157,839,905,143.67/455,210.31
  6. Step 6: Final answer
    x = 346,740.62

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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.