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Finding the Fourth Proportional to 719.62, 994.28 and 692.28

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Solution

The fourth proportional to 719.62, 994.28 and 692.28 is: 956.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.62 : 994.28 = 692.28 : x
  2. Step 2: Convert to fraction form
    719.62/994.28 = 692.28/x
  3. Step 3: Cross multiply
    719.62x = 994.28 × 692.28
  4. Step 4: Simplify right side
    719.62x = 688,316.70
  5. Step 5: Solve for x
    x = 688,316.70/719.62
  6. Step 6: Final answer
    x = 956.50

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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.