Home / 2,269.90-3,130.68-1,338.40

Finding the Fourth Proportional to 2,269.90, 3,130.68 and 1,338.40

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Solution

The fourth proportional to 2,269.90, 3,130.68 and 1,338.40 is: 1,845.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,269.90 : 3,130.68 = 1,338.40 : x
  2. Step 2: Convert to fraction form
    2,269.90/3,130.68 = 1,338.40/x
  3. Step 3: Cross multiply
    2,269.90x = 3,130.68 × 1,338.40
  4. Step 4: Simplify right side
    2,269.90x = 4,190,102.11
  5. Step 5: Solve for x
    x = 4,190,102.11/2,269.90
  6. Step 6: Final answer
    x = 1,845.94

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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.