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Finding the Fourth Proportional to 905.08, 1,247.44 and 692.32

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Solution

The fourth proportional to 905.08, 1,247.44 and 692.32 is: 954.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.08 : 1,247.44 = 692.32 : x
  2. Step 2: Convert to fraction form
    905.08/1,247.44 = 692.32/x
  3. Step 3: Cross multiply
    905.08x = 1,247.44 × 692.32
  4. Step 4: Simplify right side
    905.08x = 863,627.66
  5. Step 5: Solve for x
    x = 863,627.66/905.08
  6. Step 6: Final answer
    x = 954.20

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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.