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Finding the Fourth Proportional to 706.25, 974.67 and 469.79

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Solution

The fourth proportional to 706.25, 974.67 and 469.79 is: 648.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.25 : 974.67 = 469.79 : x
  2. Step 2: Convert to fraction form
    706.25/974.67 = 469.79/x
  3. Step 3: Cross multiply
    706.25x = 974.67 × 469.79
  4. Step 4: Simplify right side
    706.25x = 457,890.22
  5. Step 5: Solve for x
    x = 457,890.22/706.25
  6. Step 6: Final answer
    x = 648.34

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1.5x scale

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.