Home / 1,985.20-2,740.84-1,356.77

Finding the Fourth Proportional to 1,985.20, 2,740.84 and 1,356.77

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Solution

The fourth proportional to 1,985.20, 2,740.84 and 1,356.77 is: 1,873.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.20 : 2,740.84 = 1,356.77 : x
  2. Step 2: Convert to fraction form
    1,985.20/2,740.84 = 1,356.77/x
  3. Step 3: Cross multiply
    1,985.20x = 2,740.84 × 1,356.77
  4. Step 4: Simplify right side
    1,985.20x = 3,718,692.95
  5. Step 5: Solve for x
    x = 3,718,692.95/1,985.20
  6. Step 6: Final answer
    x = 1,873.21

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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.