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Finding the Fourth Proportional to 1,282.46, 1,769.79 and 692.99

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Solution

The fourth proportional to 1,282.46, 1,769.79 and 692.99 is: 956.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.46 : 1,769.79 = 692.99 : x
  2. Step 2: Convert to fraction form
    1,282.46/1,769.79 = 692.99/x
  3. Step 3: Cross multiply
    1,282.46x = 1,769.79 × 692.99
  4. Step 4: Simplify right side
    1,282.46x = 1,226,445.86
  5. Step 5: Solve for x
    x = 1,226,445.86/1,282.46
  6. Step 6: Final answer
    x = 956.33

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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.