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Finding the Fourth Proportional to 260,039.20, 390,058.80 and 231,008.80

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Solution

The fourth proportional to 260,039.20, 390,058.80 and 231,008.80 is: 346,513.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,039.20 : 390,058.80 = 231,008.80 : x
  2. Step 2: Convert to fraction form
    260,039.20/390,058.80 = 231,008.80/x
  3. Step 3: Cross multiply
    260,039.20x = 390,058.80 × 231,008.80
  4. Step 4: Simplify right side
    260,039.20x = 90,107,015,317.44
  5. Step 5: Solve for x
    x = 90,107,015,317.44/260,039.20
  6. Step 6: Final answer
    x = 346,513.20

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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.