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Finding the Fourth Proportional to 403,469.80, 604,329.90 and 261,752.20

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Solution

The fourth proportional to 403,469.80, 604,329.90 and 261,752.20 is: 392,060.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,469.80 : 604,329.90 = 261,752.20 : x
  2. Step 2: Convert to fraction form
    403,469.80/604,329.90 = 261,752.20/x
  3. Step 3: Cross multiply
    403,469.80x = 604,329.90 × 261,752.20
  4. Step 4: Simplify right side
    403,469.80x = 158,184,680,850.78
  5. Step 5: Solve for x
    x = 158,184,680,850.78/403,469.80
  6. Step 6: Final answer
    x = 392,060.77

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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.