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Finding the Fourth Proportional to 403,734.30, 605,601.45 and 395,439.90

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Solution

The fourth proportional to 403,734.30, 605,601.45 and 395,439.90 is: 593,159.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,734.30 : 605,601.45 = 395,439.90 : x
  2. Step 2: Convert to fraction form
    403,734.30/605,601.45 = 395,439.90/x
  3. Step 3: Cross multiply
    403,734.30x = 605,601.45 × 395,439.90
  4. Step 4: Simplify right side
    403,734.30x = 239,478,976,827.86
  5. Step 5: Solve for x
    x = 239,478,976,827.86/403,734.30
  6. Step 6: Final answer
    x = 593,159.85

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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.