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Finding the Fourth Proportional to 439.35, 607.47 and 384.69

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Solution

The fourth proportional to 439.35, 607.47 and 384.69 is: 531.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.35 : 607.47 = 384.69 : x
  2. Step 2: Convert to fraction form
    439.35/607.47 = 384.69/x
  3. Step 3: Cross multiply
    439.35x = 607.47 × 384.69
  4. Step 4: Simplify right side
    439.35x = 233,687.63
  5. Step 5: Solve for x
    x = 233,687.63/439.35
  6. Step 6: Final answer
    x = 531.89

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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.