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Finding the Fourth Proportional to 403,879.20, 605,818.80 and 364,513.20

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Solution

The fourth proportional to 403,879.20, 605,818.80 and 364,513.20 is: 546,769.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,879.20 : 605,818.80 = 364,513.20 : x
  2. Step 2: Convert to fraction form
    403,879.20/605,818.80 = 364,513.20/x
  3. Step 3: Cross multiply
    403,879.20x = 605,818.80 × 364,513.20
  4. Step 4: Simplify right side
    403,879.20x = 220,828,949,408.16
  5. Step 5: Solve for x
    x = 220,828,949,408.16/403,879.20
  6. Step 6: Final answer
    x = 546,769.80

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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.