Home / 1,985.53-2,977.23-668.85

Finding the Fourth Proportional to 1,985.53, 2,977.23 and 668.85

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Solution

The fourth proportional to 1,985.53, 2,977.23 and 668.85 is: 1,002.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.53 : 2,977.23 = 668.85 : x
  2. Step 2: Convert to fraction form
    1,985.53/2,977.23 = 668.85/x
  3. Step 3: Cross multiply
    1,985.53x = 2,977.23 × 668.85
  4. Step 4: Simplify right side
    1,985.53x = 1,991,305.40
  5. Step 5: Solve for x
    x = 1,991,305.40/1,985.53
  6. Step 6: Final answer
    x = 1,002.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.