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Finding the Fourth Proportional to 439.65, 607.47 and 384.30

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Solution

The fourth proportional to 439.65, 607.47 and 384.30 is: 530.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.65 : 607.47 = 384.30 : x
  2. Step 2: Convert to fraction form
    439.65/607.47 = 384.30/x
  3. Step 3: Cross multiply
    439.65x = 607.47 × 384.30
  4. Step 4: Simplify right side
    439.65x = 233,450.72
  5. Step 5: Solve for x
    x = 233,450.72/439.65
  6. Step 6: Final answer
    x = 530.99

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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.