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Finding the Fourth Proportional to 443.79, 611.91 and 384.75

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Solution

The fourth proportional to 443.79, 611.91 and 384.75 is: 530.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.79 : 611.91 = 384.75 : x
  2. Step 2: Convert to fraction form
    443.79/611.91 = 384.75/x
  3. Step 3: Cross multiply
    443.79x = 611.91 × 384.75
  4. Step 4: Simplify right side
    443.79x = 235,432.37
  5. Step 5: Solve for x
    x = 235,432.37/443.79
  6. Step 6: Final answer
    x = 530.50

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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.