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Finding the Fourth Proportional to 706.78, 975.34 and 392.01

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Solution

The fourth proportional to 706.78, 975.34 and 392.01 is: 540.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.78 : 975.34 = 392.01 : x
  2. Step 2: Convert to fraction form
    706.78/975.34 = 392.01/x
  3. Step 3: Cross multiply
    706.78x = 975.34 × 392.01
  4. Step 4: Simplify right side
    706.78x = 382,348.10
  5. Step 5: Solve for x
    x = 382,348.10/706.78
  6. Step 6: Final answer
    x = 540.98

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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.