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Finding the Fourth Proportional to 703.44, 970.69 and 388.71

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Solution

The fourth proportional to 703.44, 970.69 and 388.71 is: 536.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.44 : 970.69 = 388.71 : x
  2. Step 2: Convert to fraction form
    703.44/970.69 = 388.71/x
  3. Step 3: Cross multiply
    703.44x = 970.69 × 388.71
  4. Step 4: Simplify right side
    703.44x = 377,313.03
  5. Step 5: Solve for x
    x = 377,313.03/703.44
  6. Step 6: Final answer
    x = 536.38

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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.