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Finding the Fourth Proportional to 758.65, 1,046.91 and 427.09

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Solution

The fourth proportional to 758.65, 1,046.91 and 427.09 is: 589.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.65 : 1,046.91 = 427.09 : x
  2. Step 2: Convert to fraction form
    758.65/1,046.91 = 427.09/x
  3. Step 3: Cross multiply
    758.65x = 1,046.91 × 427.09
  4. Step 4: Simplify right side
    758.65x = 447,124.79
  5. Step 5: Solve for x
    x = 447,124.79/758.65
  6. Step 6: Final answer
    x = 589.37

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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.