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Finding the Fourth Proportional to 403,886.40, 605,858.40 and 123,403.20

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Solution

The fourth proportional to 403,886.40, 605,858.40 and 123,403.20 is: 185,113.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,886.40 : 605,858.40 = 123,403.20 : x
  2. Step 2: Convert to fraction form
    403,886.40/605,858.40 = 123,403.20/x
  3. Step 3: Cross multiply
    403,886.40x = 605,858.40 × 123,403.20
  4. Step 4: Simplify right side
    403,886.40x = 74,764,865,306.88
  5. Step 5: Solve for x
    x = 74,764,865,306.88/403,886.40
  6. Step 6: Final answer
    x = 185,113.60

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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.