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Finding the Fourth Proportional to 393,044.20, 589,690.90 and 140,319.10

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Solution

The fourth proportional to 393,044.20, 589,690.90 and 140,319.10 is: 210,523.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,044.20 : 589,690.90 = 140,319.10 : x
  2. Step 2: Convert to fraction form
    393,044.20/589,690.90 = 140,319.10/x
  3. Step 3: Cross multiply
    393,044.20x = 589,690.90 × 140,319.10
  4. Step 4: Simplify right side
    393,044.20x = 82,744,896,366.19
  5. Step 5: Solve for x
    x = 82,744,896,366.19/393,044.20
  6. Step 6: Final answer
    x = 210,523.13

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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.