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Finding the Fourth Proportional to 403,675.10, 605,512.65 and 279,259.10

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Solution

The fourth proportional to 403,675.10, 605,512.65 and 279,259.10 is: 418,888.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,675.10 : 605,512.65 = 279,259.10 : x
  2. Step 2: Convert to fraction form
    403,675.10/605,512.65 = 279,259.10/x
  3. Step 3: Cross multiply
    403,675.10x = 605,512.65 × 279,259.10
  4. Step 4: Simplify right side
    403,675.10x = 169,094,917,677.62
  5. Step 5: Solve for x
    x = 169,094,917,677.62/403,675.10
  6. Step 6: Final answer
    x = 418,888.65

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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.