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Finding the Fourth Proportional to 403,928.20, 605,892.30 and 262,923.40

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Solution

The fourth proportional to 403,928.20, 605,892.30 and 262,923.40 is: 394,385.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,928.20 : 605,892.30 = 262,923.40 : x
  2. Step 2: Convert to fraction form
    403,928.20/605,892.30 = 262,923.40/x
  3. Step 3: Cross multiply
    403,928.20x = 605,892.30 × 262,923.40
  4. Step 4: Simplify right side
    403,928.20x = 159,303,263,549.82
  5. Step 5: Solve for x
    x = 159,303,263,549.82/403,928.20
  6. Step 6: Final answer
    x = 394,385.10

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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.