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Finding the Fourth Proportional to 443.61, 611.93 and 319.01

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Solution

The fourth proportional to 443.61, 611.93 and 319.01 is: 440.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.61 : 611.93 = 319.01 : x
  2. Step 2: Convert to fraction form
    443.61/611.93 = 319.01/x
  3. Step 3: Cross multiply
    443.61x = 611.93 × 319.01
  4. Step 4: Simplify right side
    443.61x = 195,207.13
  5. Step 5: Solve for x
    x = 195,207.13/443.61
  6. Step 6: Final answer
    x = 440.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.