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Finding the Fourth Proportional to 257,066.60, 385,139.10 and 220,202.60

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Solution

The fourth proportional to 257,066.60, 385,139.10 and 220,202.60 is: 329,909.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,066.60 : 385,139.10 = 220,202.60 : x
  2. Step 2: Convert to fraction form
    257,066.60/385,139.10 = 220,202.60/x
  3. Step 3: Cross multiply
    257,066.60x = 385,139.10 × 220,202.60
  4. Step 4: Simplify right side
    257,066.60x = 84,808,631,181.66
  5. Step 5: Solve for x
    x = 84,808,631,181.66/257,066.60
  6. Step 6: Final answer
    x = 329,909.18

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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.