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Finding the Fourth Proportional to 703.07, 970.21 and 388.32

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Solution

The fourth proportional to 703.07, 970.21 and 388.32 is: 535.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.07 : 970.21 = 388.32 : x
  2. Step 2: Convert to fraction form
    703.07/970.21 = 388.32/x
  3. Step 3: Cross multiply
    703.07x = 970.21 × 388.32
  4. Step 4: Simplify right side
    703.07x = 376,750.98
  5. Step 5: Solve for x
    x = 376,750.98/703.07
  6. Step 6: Final answer
    x = 535.87

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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.