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Finding the Fourth Proportional to 478,311.55, 660,069.90 and 263,451.62

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Solution

The fourth proportional to 478,311.55, 660,069.90 and 263,451.62 is: 363,563.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,311.55 : 660,069.90 = 263,451.62 : x
  2. Step 2: Convert to fraction form
    478,311.55/660,069.90 = 263,451.62/x
  3. Step 3: Cross multiply
    478,311.55x = 660,069.90 × 263,451.62
  4. Step 4: Simplify right side
    478,311.55x = 173,896,486,777.04
  5. Step 5: Solve for x
    x = 173,896,486,777.04/478,311.55
  6. Step 6: Final answer
    x = 363,563.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.