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Finding the Fourth Proportional to 708.85, 1,063.34 and 297.91

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Solution

The fourth proportional to 708.85, 1,063.34 and 297.91 is: 446.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.85 : 1,063.34 = 297.91 : x
  2. Step 2: Convert to fraction form
    708.85/1,063.34 = 297.91/x
  3. Step 3: Cross multiply
    708.85x = 1,063.34 × 297.91
  4. Step 4: Simplify right side
    708.85x = 316,779.62
  5. Step 5: Solve for x
    x = 316,779.62/708.85
  6. Step 6: Final answer
    x = 446.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.