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Finding the Fourth Proportional to 2,011.80, 3,017.51 and 713.20

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Solution

The fourth proportional to 2,011.80, 3,017.51 and 713.20 is: 1,069.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,011.80 : 3,017.51 = 713.20 : x
  2. Step 2: Convert to fraction form
    2,011.80/3,017.51 = 713.20/x
  3. Step 3: Cross multiply
    2,011.80x = 3,017.51 × 713.20
  4. Step 4: Simplify right side
    2,011.80x = 2,152,088.13
  5. Step 5: Solve for x
    x = 2,152,088.13/2,011.80
  6. Step 6: Final answer
    x = 1,069.73

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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.