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Finding the Fourth Proportional to 403,886.10, 605,938.20 and 123,395.70

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Solution

The fourth proportional to 403,886.10, 605,938.20 and 123,395.70 is: 185,126.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,886.10 : 605,938.20 = 123,395.70 : x
  2. Step 2: Convert to fraction form
    403,886.10/605,938.20 = 123,395.70/x
  3. Step 3: Cross multiply
    403,886.10x = 605,938.20 × 123,395.70
  4. Step 4: Simplify right side
    403,886.10x = 74,770,168,345.74
  5. Step 5: Solve for x
    x = 74,770,168,345.74/403,886.10
  6. Step 6: Final answer
    x = 185,126.87

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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.