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Finding the Fourth Proportional to 403,812.60, 605,718.90 and 123,293.40

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Solution

The fourth proportional to 403,812.60, 605,718.90 and 123,293.40 is: 184,940.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,812.60 : 605,718.90 = 123,293.40 : x
  2. Step 2: Convert to fraction form
    403,812.60/605,718.90 = 123,293.40/x
  3. Step 3: Cross multiply
    403,812.60x = 605,718.90 × 123,293.40
  4. Step 4: Simplify right side
    403,812.60x = 74,681,142,625.26
  5. Step 5: Solve for x
    x = 74,681,142,625.26/403,812.60
  6. Step 6: Final answer
    x = 184,940.10

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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.