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Finding the Fourth Proportional to 707.19, 975.97 and 392.48

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Solution

The fourth proportional to 707.19, 975.97 and 392.48 is: 541.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.19 : 975.97 = 392.48 : x
  2. Step 2: Convert to fraction form
    707.19/975.97 = 392.48/x
  3. Step 3: Cross multiply
    707.19x = 975.97 × 392.48
  4. Step 4: Simplify right side
    707.19x = 383,046.74
  5. Step 5: Solve for x
    x = 383,046.74/707.19
  6. Step 6: Final answer
    x = 541.65

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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.