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Finding the Fourth Proportional to 2,109.88, 3,164.70 and 649.03

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Solution

The fourth proportional to 2,109.88, 3,164.70 and 649.03 is: 973.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.88 : 3,164.70 = 649.03 : x
  2. Step 2: Convert to fraction form
    2,109.88/3,164.70 = 649.03/x
  3. Step 3: Cross multiply
    2,109.88x = 3,164.70 × 649.03
  4. Step 4: Simplify right side
    2,109.88x = 2,053,985.24
  5. Step 5: Solve for x
    x = 2,053,985.24/2,109.88
  6. Step 6: Final answer
    x = 973.51

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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.