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Finding the Fourth Proportional to 2,981.89, 4,472.87 and 790.84

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Solution

The fourth proportional to 2,981.89, 4,472.87 and 790.84 is: 1,186.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.89 : 4,472.87 = 790.84 : x
  2. Step 2: Convert to fraction form
    2,981.89/4,472.87 = 790.84/x
  3. Step 3: Cross multiply
    2,981.89x = 4,472.87 × 790.84
  4. Step 4: Simplify right side
    2,981.89x = 3,537,324.51
  5. Step 5: Solve for x
    x = 3,537,324.51/2,981.89
  6. Step 6: Final answer
    x = 1,186.27

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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.