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Finding the Fourth Proportional to 293,479.80, 440,219.70 and 143,743.20

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Solution

The fourth proportional to 293,479.80, 440,219.70 and 143,743.20 is: 215,614.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    293,479.80 : 440,219.70 = 143,743.20 : x
  2. Step 2: Convert to fraction form
    293,479.80/440,219.70 = 143,743.20/x
  3. Step 3: Cross multiply
    293,479.80x = 440,219.70 × 143,743.20
  4. Step 4: Simplify right side
    293,479.80x = 63,278,588,381.04
  5. Step 5: Solve for x
    x = 63,278,588,381.04/293,479.80
  6. Step 6: Final answer
    x = 215,614.80

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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.