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Finding the Fourth Proportional to 343,898.60, 515,847.90 and 320,570.60

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Solution

The fourth proportional to 343,898.60, 515,847.90 and 320,570.60 is: 480,855.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,898.60 : 515,847.90 = 320,570.60 : x
  2. Step 2: Convert to fraction form
    343,898.60/515,847.90 = 320,570.60/x
  3. Step 3: Cross multiply
    343,898.60x = 515,847.90 × 320,570.60
  4. Step 4: Simplify right side
    343,898.60x = 165,365,670,811.74
  5. Step 5: Solve for x
    x = 165,365,670,811.74/343,898.60
  6. Step 6: Final answer
    x = 480,855.90

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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.