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Finding the Fourth Proportional to 438,464.80, 658,388.40 and 251,840.80

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Solution

The fourth proportional to 438,464.80, 658,388.40 and 251,840.80 is: 378,158.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,464.80 : 658,388.40 = 251,840.80 : x
  2. Step 2: Convert to fraction form
    438,464.80/658,388.40 = 251,840.80/x
  3. Step 3: Cross multiply
    438,464.80x = 658,388.40 × 251,840.80
  4. Step 4: Simplify right side
    438,464.80x = 165,809,061,366.72
  5. Step 5: Solve for x
    x = 165,809,061,366.72/438,464.80
  6. Step 6: Final answer
    x = 378,158.20

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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.