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Finding the Fourth Proportional to 455,243.61, 628,236.30 and 251,294.65

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Solution

The fourth proportional to 455,243.61, 628,236.30 and 251,294.65 is: 346,786.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,243.61 : 628,236.30 = 251,294.65 : x
  2. Step 2: Convert to fraction form
    455,243.61/628,236.30 = 251,294.65/x
  3. Step 3: Cross multiply
    455,243.61x = 628,236.30 × 251,294.65
  4. Step 4: Simplify right side
    455,243.61x = 157,872,421,125.80
  5. Step 5: Solve for x
    x = 157,872,421,125.80/455,243.61
  6. Step 6: Final answer
    x = 346,786.68

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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.