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Finding the Fourth Proportional to 700.75, 965.84 and 479.31

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Solution

The fourth proportional to 700.75, 965.84 and 479.31 is: 660.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.75 : 965.84 = 479.31 : x
  2. Step 2: Convert to fraction form
    700.75/965.84 = 479.31/x
  3. Step 3: Cross multiply
    700.75x = 965.84 × 479.31
  4. Step 4: Simplify right side
    700.75x = 462,936.77
  5. Step 5: Solve for x
    x = 462,936.77/700.75
  6. Step 6: Final answer
    x = 660.63

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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.