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Finding the Fourth Proportional to 723.50, 1,000.23 and 692.90

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Solution

The fourth proportional to 723.50, 1,000.23 and 692.90 is: 957.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.50 : 1,000.23 = 692.90 : x
  2. Step 2: Convert to fraction form
    723.50/1,000.23 = 692.90/x
  3. Step 3: Cross multiply
    723.50x = 1,000.23 × 692.90
  4. Step 4: Simplify right side
    723.50x = 693,059.37
  5. Step 5: Solve for x
    x = 693,059.37/723.50
  6. Step 6: Final answer
    x = 957.93

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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.