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Finding the Fourth Proportional to 707.34, 976.05 and 392.61

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Solution

The fourth proportional to 707.34, 976.05 and 392.61 is: 541.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.34 : 976.05 = 392.61 : x
  2. Step 2: Convert to fraction form
    707.34/976.05 = 392.61/x
  3. Step 3: Cross multiply
    707.34x = 976.05 × 392.61
  4. Step 4: Simplify right side
    707.34x = 383,206.99
  5. Step 5: Solve for x
    x = 383,206.99/707.34
  6. Step 6: Final answer
    x = 541.76

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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.