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Finding the Fourth Proportional to 2,005.80, 3,011.90 and 1,461.80

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Solution

The fourth proportional to 2,005.80, 3,011.90 and 1,461.80 is: 2,195.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,005.80 : 3,011.90 = 1,461.80 : x
  2. Step 2: Convert to fraction form
    2,005.80/3,011.90 = 1,461.80/x
  3. Step 3: Cross multiply
    2,005.80x = 3,011.90 × 1,461.80
  4. Step 4: Simplify right side
    2,005.80x = 4,402,795.42
  5. Step 5: Solve for x
    x = 4,402,795.42/2,005.80
  6. Step 6: Final answer
    x = 2,195.03

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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.