Home / 2,145.79-2,961.65-1,306.77

Finding the Fourth Proportional to 2,145.79, 2,961.65 and 1,306.77

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Solution

The fourth proportional to 2,145.79, 2,961.65 and 1,306.77 is: 1,803.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.79 : 2,961.65 = 1,306.77 : x
  2. Step 2: Convert to fraction form
    2,145.79/2,961.65 = 1,306.77/x
  3. Step 3: Cross multiply
    2,145.79x = 2,961.65 × 1,306.77
  4. Step 4: Simplify right side
    2,145.79x = 3,870,174.03
  5. Step 5: Solve for x
    x = 3,870,174.03/2,145.79
  6. Step 6: Final answer
    x = 1,803.62

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Double scale
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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.