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Finding the Fourth Proportional to 1,692.70, 2,335.70 and 946.56

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Solution

The fourth proportional to 1,692.70, 2,335.70 and 946.56 is: 1,306.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,692.70 : 2,335.70 = 946.56 : x
  2. Step 2: Convert to fraction form
    1,692.70/2,335.70 = 946.56/x
  3. Step 3: Cross multiply
    1,692.70x = 2,335.70 × 946.56
  4. Step 4: Simplify right side
    1,692.70x = 2,210,880.19
  5. Step 5: Solve for x
    x = 2,210,880.19/1,692.70
  6. Step 6: Final answer
    x = 1,306.13

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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.