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Finding the Fourth Proportional to 706.39, 975.21 and 470.66

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Solution

The fourth proportional to 706.39, 975.21 and 470.66 is: 649.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.39 : 975.21 = 470.66 : x
  2. Step 2: Convert to fraction form
    706.39/975.21 = 470.66/x
  3. Step 3: Cross multiply
    706.39x = 975.21 × 470.66
  4. Step 4: Simplify right side
    706.39x = 458,985.70
  5. Step 5: Solve for x
    x = 458,985.70/706.39
  6. Step 6: Final answer
    x = 649.76

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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.