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Finding the Fourth Proportional to 260,028.30, 390,042.45 and 220,662.30

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Solution

The fourth proportional to 260,028.30, 390,042.45 and 220,662.30 is: 330,993.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,028.30 : 390,042.45 = 220,662.30 : x
  2. Step 2: Convert to fraction form
    260,028.30/390,042.45 = 220,662.30/x
  3. Step 3: Cross multiply
    260,028.30x = 390,042.45 × 220,662.30
  4. Step 4: Simplify right side
    260,028.30x = 86,067,664,114.64
  5. Step 5: Solve for x
    x = 86,067,664,114.64/260,028.30
  6. Step 6: Final answer
    x = 330,993.45

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1.5x scale

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.