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Finding the Fourth Proportional to 703.12, 969.90 and 423.16

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Solution

The fourth proportional to 703.12, 969.90 and 423.16 is: 583.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.12 : 969.90 = 423.16 : x
  2. Step 2: Convert to fraction form
    703.12/969.90 = 423.16/x
  3. Step 3: Cross multiply
    703.12x = 969.90 × 423.16
  4. Step 4: Simplify right side
    703.12x = 410,422.88
  5. Step 5: Solve for x
    x = 410,422.88/703.12
  6. Step 6: Final answer
    x = 583.72

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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.