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Finding the Fourth Proportional to 692.84, 957.06 and 561.62

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Solution

The fourth proportional to 692.84, 957.06 and 561.62 is: 775.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.84 : 957.06 = 561.62 : x
  2. Step 2: Convert to fraction form
    692.84/957.06 = 561.62/x
  3. Step 3: Cross multiply
    692.84x = 957.06 × 561.62
  4. Step 4: Simplify right side
    692.84x = 537,499.25
  5. Step 5: Solve for x
    x = 537,499.25/692.84
  6. Step 6: Final answer
    x = 775.80

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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.