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Finding the Fourth Proportional to 403,253.20, 604,879.80 and 261,535.60

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Solution

The fourth proportional to 403,253.20, 604,879.80 and 261,535.60 is: 392,303.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,253.20 : 604,879.80 = 261,535.60 : x
  2. Step 2: Convert to fraction form
    403,253.20/604,879.80 = 261,535.60/x
  3. Step 3: Cross multiply
    403,253.20x = 604,879.80 × 261,535.60
  4. Step 4: Simplify right side
    403,253.20x = 158,197,601,420.88
  5. Step 5: Solve for x
    x = 158,197,601,420.88/403,253.20
  6. Step 6: Final answer
    x = 392,303.40

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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.