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Finding the Fourth Proportional to 403,810.20, 605,715.30 and 123,327.45

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Solution

The fourth proportional to 403,810.20, 605,715.30 and 123,327.45 is: 184,991.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,810.20 : 605,715.30 = 123,327.45 : x
  2. Step 2: Convert to fraction form
    403,810.20/605,715.30 = 123,327.45/x
  3. Step 3: Cross multiply
    403,810.20x = 605,715.30 × 123,327.45
  4. Step 4: Simplify right side
    403,810.20x = 74,701,323,374.99
  5. Step 5: Solve for x
    x = 74,701,323,374.99/403,810.20
  6. Step 6: Final answer
    x = 184,991.18

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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.