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Finding the Fourth Proportional to 403,608.60, 604,980.90 and 137,122.20

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Solution

The fourth proportional to 403,608.60, 604,980.90 and 137,122.20 is: 205,536.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,608.60 : 604,980.90 = 137,122.20 : x
  2. Step 2: Convert to fraction form
    403,608.60/604,980.90 = 137,122.20/x
  3. Step 3: Cross multiply
    403,608.60x = 604,980.90 × 137,122.20
  4. Step 4: Simplify right side
    403,608.60x = 82,956,311,965.98
  5. Step 5: Solve for x
    x = 82,956,311,965.98/403,608.60
  6. Step 6: Final answer
    x = 205,536.53

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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.