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Finding the Fourth Proportional to 708.46, 976.98 and 521.62

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Solution

The fourth proportional to 708.46, 976.98 and 521.62 is: 719.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.46 : 976.98 = 521.62 : x
  2. Step 2: Convert to fraction form
    708.46/976.98 = 521.62/x
  3. Step 3: Cross multiply
    708.46x = 976.98 × 521.62
  4. Step 4: Simplify right side
    708.46x = 509,612.31
  5. Step 5: Solve for x
    x = 509,612.31/708.46
  6. Step 6: Final answer
    x = 719.32

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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.