Home / 1,345.23-2,020.68-1,308.78

Finding the Fourth Proportional to 1,345.23, 2,020.68 and 1,308.78

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Solution

The fourth proportional to 1,345.23, 2,020.68 and 1,308.78 is: 1,965.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.23 : 2,020.68 = 1,308.78 : x
  2. Step 2: Convert to fraction form
    1,345.23/2,020.68 = 1,308.78/x
  3. Step 3: Cross multiply
    1,345.23x = 2,020.68 × 1,308.78
  4. Step 4: Simplify right side
    1,345.23x = 2,644,625.57
  5. Step 5: Solve for x
    x = 2,644,625.57/1,345.23
  6. Step 6: Final answer
    x = 1,965.93

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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.