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Finding the Fourth Proportional to 403,978.80, 605,093.40 and 262,261.20

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Solution

The fourth proportional to 403,978.80, 605,093.40 and 262,261.20 is: 392,823.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,978.80 : 605,093.40 = 262,261.20 : x
  2. Step 2: Convert to fraction form
    403,978.80/605,093.40 = 262,261.20/x
  3. Step 3: Cross multiply
    403,978.80x = 605,093.40 × 262,261.20
  4. Step 4: Simplify right side
    403,978.80x = 158,692,521,196.08
  5. Step 5: Solve for x
    x = 158,692,521,196.08/403,978.80
  6. Step 6: Final answer
    x = 392,823.88

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.