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Finding the Fourth Proportional to 403,840.80, 605,761.20 and 262,123.20

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Solution

The fourth proportional to 403,840.80, 605,761.20 and 262,123.20 is: 393,184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,840.80 : 605,761.20 = 262,123.20 : x
  2. Step 2: Convert to fraction form
    403,840.80/605,761.20 = 262,123.20/x
  3. Step 3: Cross multiply
    403,840.80x = 605,761.20 × 262,123.20
  4. Step 4: Simplify right side
    403,840.80x = 158,784,064,179.84
  5. Step 5: Solve for x
    x = 158,784,064,179.84/403,840.80
  6. Step 6: Final answer
    x = 393,184.80

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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.