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Finding the Fourth Proportional to 703.45, 970.23 and 538.21

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Solution

The fourth proportional to 703.45, 970.23 and 538.21 is: 742.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.45 : 970.23 = 538.21 : x
  2. Step 2: Convert to fraction form
    703.45/970.23 = 538.21/x
  3. Step 3: Cross multiply
    703.45x = 970.23 × 538.21
  4. Step 4: Simplify right side
    703.45x = 522,187.69
  5. Step 5: Solve for x
    x = 522,187.69/703.45
  6. Step 6: Final answer
    x = 742.32

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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.