Home / 2,130.30-2,938.68-1,383.48

Finding the Fourth Proportional to 2,130.30, 2,938.68 and 1,383.48

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Solution

The fourth proportional to 2,130.30, 2,938.68 and 1,383.48 is: 1,908.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.30 : 2,938.68 = 1,383.48 : x
  2. Step 2: Convert to fraction form
    2,130.30/2,938.68 = 1,383.48/x
  3. Step 3: Cross multiply
    2,130.30x = 2,938.68 × 1,383.48
  4. Step 4: Simplify right side
    2,130.30x = 4,065,605.01
  5. Step 5: Solve for x
    x = 4,065,605.01/2,130.30
  6. Step 6: Final answer
    x = 1,908.47

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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.