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Finding the Fourth Proportional to 419,026.40, 628,539.60 and 251,064.80

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Solution

The fourth proportional to 419,026.40, 628,539.60 and 251,064.80 is: 376,597.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,026.40 : 628,539.60 = 251,064.80 : x
  2. Step 2: Convert to fraction form
    419,026.40/628,539.60 = 251,064.80/x
  3. Step 3: Cross multiply
    419,026.40x = 628,539.60 × 251,064.80
  4. Step 4: Simplify right side
    419,026.40x = 157,804,168,966.08
  5. Step 5: Solve for x
    x = 157,804,168,966.08/419,026.40
  6. Step 6: Final answer
    x = 376,597.20

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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.