Home / 1,328.35-2,002.55-1,239.19

Finding the Fourth Proportional to 1,328.35, 2,002.55 and 1,239.19

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Solution

The fourth proportional to 1,328.35, 2,002.55 and 1,239.19 is: 1,868.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.35 : 2,002.55 = 1,239.19 : x
  2. Step 2: Convert to fraction form
    1,328.35/2,002.55 = 1,239.19/x
  3. Step 3: Cross multiply
    1,328.35x = 2,002.55 × 1,239.19
  4. Step 4: Simplify right side
    1,328.35x = 2,481,539.93
  5. Step 5: Solve for x
    x = 2,481,539.93/1,328.35
  6. Step 6: Final answer
    x = 1,868.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.