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Finding the Fourth Proportional to 403,272.60, 604,908.90 and 278,856.60

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Solution

The fourth proportional to 403,272.60, 604,908.90 and 278,856.60 is: 418,284.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,272.60 : 604,908.90 = 278,856.60 : x
  2. Step 2: Convert to fraction form
    403,272.60/604,908.90 = 278,856.60/x
  3. Step 3: Cross multiply
    403,272.60x = 604,908.90 × 278,856.60
  4. Step 4: Simplify right side
    403,272.60x = 168,682,839,163.74
  5. Step 5: Solve for x
    x = 168,682,839,163.74/403,272.60
  6. Step 6: Final answer
    x = 418,284.90

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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.