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Finding the Fourth Proportional to 403,359.19, 605,043.65 and 122,878.87

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Solution

The fourth proportional to 403,359.19, 605,043.65 and 122,878.87 is: 184,319.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,359.19 : 605,043.65 = 122,878.87 : x
  2. Step 2: Convert to fraction form
    403,359.19/605,043.65 = 122,878.87/x
  3. Step 3: Cross multiply
    403,359.19x = 605,043.65 × 122,878.87
  4. Step 4: Simplify right side
    403,359.19x = 74,347,079,398.28
  5. Step 5: Solve for x
    x = 74,347,079,398.28/403,359.19
  6. Step 6: Final answer
    x = 184,319.79

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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.