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Finding the Fourth Proportional to 395,428.80, 593,143.20 and 290,452.80

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Solution

The fourth proportional to 395,428.80, 593,143.20 and 290,452.80 is: 435,679.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,428.80 : 593,143.20 = 290,452.80 : x
  2. Step 2: Convert to fraction form
    395,428.80/593,143.20 = 290,452.80/x
  3. Step 3: Cross multiply
    395,428.80x = 593,143.20 × 290,452.80
  4. Step 4: Simplify right side
    395,428.80x = 172,280,103,240.96
  5. Step 5: Solve for x
    x = 172,280,103,240.96/395,428.80
  6. Step 6: Final answer
    x = 435,679.20

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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.