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Finding the Fourth Proportional to 1,692.90, 2,336.34 and 947.01

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Solution

The fourth proportional to 1,692.90, 2,336.34 and 947.01 is: 1,306.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,692.90 : 2,336.34 = 947.01 : x
  2. Step 2: Convert to fraction form
    1,692.90/2,336.34 = 947.01/x
  3. Step 3: Cross multiply
    1,692.90x = 2,336.34 × 947.01
  4. Step 4: Simplify right side
    1,692.90x = 2,212,537.34
  5. Step 5: Solve for x
    x = 2,212,537.34/1,692.90
  6. Step 6: Final answer
    x = 1,306.95

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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.