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Finding the Fourth Proportional to 445.91, 665.62 and 384.35

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Solution

The fourth proportional to 445.91, 665.62 and 384.35 is: 573.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.91 : 665.62 = 384.35 : x
  2. Step 2: Convert to fraction form
    445.91/665.62 = 384.35/x
  3. Step 3: Cross multiply
    445.91x = 665.62 × 384.35
  4. Step 4: Simplify right side
    445.91x = 255,826.76
  5. Step 5: Solve for x
    x = 255,826.76/445.91
  6. Step 6: Final answer
    x = 573.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.