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Finding the Fourth Proportional to 260,045.30, 389,630.55 and 222,428.90

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Solution

The fourth proportional to 260,045.30, 389,630.55 and 222,428.90 is: 333,269.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,045.30 : 389,630.55 = 222,428.90 : x
  2. Step 2: Convert to fraction form
    260,045.30/389,630.55 = 222,428.90/x
  3. Step 3: Cross multiply
    260,045.30x = 389,630.55 × 222,428.90
  4. Step 4: Simplify right side
    260,045.30x = 86,665,094,642.90
  5. Step 5: Solve for x
    x = 86,665,094,642.90/260,045.30
  6. Step 6: Final answer
    x = 333,269.22

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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.