Home / 2,985.53-4,123.49-1,989.07

Finding the Fourth Proportional to 2,985.53, 4,123.49 and 1,989.07

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Solution

The fourth proportional to 2,985.53, 4,123.49 and 1,989.07 is: 2,747.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.53 : 4,123.49 = 1,989.07 : x
  2. Step 2: Convert to fraction form
    2,985.53/4,123.49 = 1,989.07/x
  3. Step 3: Cross multiply
    2,985.53x = 4,123.49 × 1,989.07
  4. Step 4: Simplify right side
    2,985.53x = 8,201,924.38
  5. Step 5: Solve for x
    x = 8,201,924.38/2,985.53
  6. Step 6: Final answer
    x = 2,747.23

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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.