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Finding the Fourth Proportional to 703.86, 970.93 and 438.21

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Solution

The fourth proportional to 703.86, 970.93 and 438.21 is: 604.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.86 : 970.93 = 438.21 : x
  2. Step 2: Convert to fraction form
    703.86/970.93 = 438.21/x
  3. Step 3: Cross multiply
    703.86x = 970.93 × 438.21
  4. Step 4: Simplify right side
    703.86x = 425,471.24
  5. Step 5: Solve for x
    x = 425,471.24/703.86
  6. Step 6: Final answer
    x = 604.48

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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.