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Finding the Fourth Proportional to 485,679.25, 670,237.37 and 284,475.25

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Solution

The fourth proportional to 485,679.25, 670,237.37 and 284,475.25 is: 392,575.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,679.25 : 670,237.37 = 284,475.25 : x
  2. Step 2: Convert to fraction form
    485,679.25/670,237.37 = 284,475.25/x
  3. Step 3: Cross multiply
    485,679.25x = 670,237.37 × 284,475.25
  4. Step 4: Simplify right side
    485,679.25x = 190,665,943,390.09
  5. Step 5: Solve for x
    x = 190,665,943,390.09/485,679.25
  6. Step 6: Final answer
    x = 392,575.85

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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.