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Finding the Fourth Proportional to 1,881.64, 2,822.28 and 649.14

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Solution

The fourth proportional to 1,881.64, 2,822.28 and 649.14 is: 973.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881.64 : 2,822.28 = 649.14 : x
  2. Step 2: Convert to fraction form
    1,881.64/2,822.28 = 649.14/x
  3. Step 3: Cross multiply
    1,881.64x = 2,822.28 × 649.14
  4. Step 4: Simplify right side
    1,881.64x = 1,832,054.84
  5. Step 5: Solve for x
    x = 1,832,054.84/1,881.64
  6. Step 6: Final answer
    x = 973.65

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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.