Home / 1,985.04-2,739.84-1,356.90

Finding the Fourth Proportional to 1,985.04, 2,739.84 and 1,356.90

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Solution

The fourth proportional to 1,985.04, 2,739.84 and 1,356.90 is: 1,872.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.04 : 2,739.84 = 1,356.90 : x
  2. Step 2: Convert to fraction form
    1,985.04/2,739.84 = 1,356.90/x
  3. Step 3: Cross multiply
    1,985.04x = 2,739.84 × 1,356.90
  4. Step 4: Simplify right side
    1,985.04x = 3,717,688.90
  5. Step 5: Solve for x
    x = 3,717,688.90/1,985.04
  6. Step 6: Final answer
    x = 1,872.85

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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.