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Finding the Fourth Proportional to 403,478.40, 605,217.60 and 359,932.80

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Solution

The fourth proportional to 403,478.40, 605,217.60 and 359,932.80 is: 539,899.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,478.40 : 605,217.60 = 359,932.80 : x
  2. Step 2: Convert to fraction form
    403,478.40/605,217.60 = 359,932.80/x
  3. Step 3: Cross multiply
    403,478.40x = 605,217.60 × 359,932.80
  4. Step 4: Simplify right side
    403,478.40x = 217,837,665,377.28
  5. Step 5: Solve for x
    x = 217,837,665,377.28/403,478.40
  6. Step 6: Final answer
    x = 539,899.20

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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.