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Finding the Fourth Proportional to 2,130.73, 3,195.20 and 649.49

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Solution

The fourth proportional to 2,130.73, 3,195.20 and 649.49 is: 973.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.73 : 3,195.20 = 649.49 : x
  2. Step 2: Convert to fraction form
    2,130.73/3,195.20 = 649.49/x
  3. Step 3: Cross multiply
    2,130.73x = 3,195.20 × 649.49
  4. Step 4: Simplify right side
    2,130.73x = 2,075,236.10
  5. Step 5: Solve for x
    x = 2,075,236.10/2,130.73
  6. Step 6: Final answer
    x = 973.96

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Double scale
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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.