Home / 1,351.80-2,013.75-1,289.16

Finding the Fourth Proportional to 1,351.80, 2,013.75 and 1,289.16

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Solution

The fourth proportional to 1,351.80, 2,013.75 and 1,289.16 is: 1,920.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.80 : 2,013.75 = 1,289.16 : x
  2. Step 2: Convert to fraction form
    1,351.80/2,013.75 = 1,289.16/x
  3. Step 3: Cross multiply
    1,351.80x = 2,013.75 × 1,289.16
  4. Step 4: Simplify right side
    1,351.80x = 2,596,045.95
  5. Step 5: Solve for x
    x = 2,596,045.95/1,351.80
  6. Step 6: Final answer
    x = 1,920.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.