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Finding the Fourth Proportional to 1,692.74, 2,335.70 and 1,029.80

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Solution

The fourth proportional to 1,692.74, 2,335.70 and 1,029.80 is: 1,420.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,692.74 : 2,335.70 = 1,029.80 : x
  2. Step 2: Convert to fraction form
    1,692.74/2,335.70 = 1,029.80/x
  3. Step 3: Cross multiply
    1,692.74x = 2,335.70 × 1,029.80
  4. Step 4: Simplify right side
    1,692.74x = 2,405,303.86
  5. Step 5: Solve for x
    x = 2,405,303.86/1,692.74
  6. Step 6: Final answer
    x = 1,420.95

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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.