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Finding the Fourth Proportional to 1,692.45, 2,335.57 and 946.40

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Solution

The fourth proportional to 1,692.45, 2,335.57 and 946.40 is: 1,306.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,692.45 : 2,335.57 = 946.40 : x
  2. Step 2: Convert to fraction form
    1,692.45/2,335.57 = 946.40/x
  3. Step 3: Cross multiply
    1,692.45x = 2,335.57 × 946.40
  4. Step 4: Simplify right side
    1,692.45x = 2,210,378.72
  5. Step 5: Solve for x
    x = 2,210,378.72/1,692.45
  6. Step 6: Final answer
    x = 1,306.02

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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.