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Finding the Fourth Proportional to 721.32, 994.32 and 692.16

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Solution

The fourth proportional to 721.32, 994.32 and 692.16 is: 954.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.32 : 994.32 = 692.16 : x
  2. Step 2: Convert to fraction form
    721.32/994.32 = 692.16/x
  3. Step 3: Cross multiply
    721.32x = 994.32 × 692.16
  4. Step 4: Simplify right side
    721.32x = 688,228.53
  5. Step 5: Solve for x
    x = 688,228.53/721.32
  6. Step 6: Final answer
    x = 954.12

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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.