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Finding the Fourth Proportional to 393,350.70, 589,680.45 and 235,641.90

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Solution

The fourth proportional to 393,350.70, 589,680.45 and 235,641.90 is: 353,255.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,350.70 : 589,680.45 = 235,641.90 : x
  2. Step 2: Convert to fraction form
    393,350.70/589,680.45 = 235,641.90/x
  3. Step 3: Cross multiply
    393,350.70x = 589,680.45 × 235,641.90
  4. Step 4: Simplify right side
    393,350.70x = 138,953,421,630.86
  5. Step 5: Solve for x
    x = 138,953,421,630.86/393,350.70
  6. Step 6: Final answer
    x = 353,255.81

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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.