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Finding the Fourth Proportional to 703.35, 970.61 and 388.65

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Solution

The fourth proportional to 703.35, 970.61 and 388.65 is: 536.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.35 : 970.61 = 388.65 : x
  2. Step 2: Convert to fraction form
    703.35/970.61 = 388.65/x
  3. Step 3: Cross multiply
    703.35x = 970.61 × 388.65
  4. Step 4: Simplify right side
    703.35x = 377,227.58
  5. Step 5: Solve for x
    x = 377,227.58/703.35
  6. Step 6: Final answer
    x = 536.33

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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.