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Finding the Fourth Proportional to 403,928.40, 605,921.40 and 123,445.20

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Solution

The fourth proportional to 403,928.40, 605,921.40 and 123,445.20 is: 185,176.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,928.40 : 605,921.40 = 123,445.20 : x
  2. Step 2: Convert to fraction form
    403,928.40/605,921.40 = 123,445.20/x
  3. Step 3: Cross multiply
    403,928.40x = 605,921.40 × 123,445.20
  4. Step 4: Simplify right side
    403,928.40x = 74,798,088,407.28
  5. Step 5: Solve for x
    x = 74,798,088,407.28/403,928.40
  6. Step 6: Final answer
    x = 185,176.60

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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.