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Finding the Fourth Proportional to 703.39, 970.74 and 388.69

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Solution

The fourth proportional to 703.39, 970.74 and 388.69 is: 536.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.39 : 970.74 = 388.69 : x
  2. Step 2: Convert to fraction form
    703.39/970.74 = 388.69/x
  3. Step 3: Cross multiply
    703.39x = 970.74 × 388.69
  4. Step 4: Simplify right side
    703.39x = 377,316.93
  5. Step 5: Solve for x
    x = 377,316.93/703.39
  6. Step 6: Final answer
    x = 536.43

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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.