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Finding the Fourth Proportional to 2,130.79, 3,197.12 and 745.12

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Solution

The fourth proportional to 2,130.79, 3,197.12 and 745.12 is: 1,118.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.79 : 3,197.12 = 745.12 : x
  2. Step 2: Convert to fraction form
    2,130.79/3,197.12 = 745.12/x
  3. Step 3: Cross multiply
    2,130.79x = 3,197.12 × 745.12
  4. Step 4: Simplify right side
    2,130.79x = 2,382,251.51
  5. Step 5: Solve for x
    x = 2,382,251.51/2,130.79
  6. Step 6: Final answer
    x = 1,118.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.