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Finding the Fourth Proportional to 1,664.21, 2,296.62 and 918.14

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Solution

The fourth proportional to 1,664.21, 2,296.62 and 918.14 is: 1,267.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,664.21 : 2,296.62 = 918.14 : x
  2. Step 2: Convert to fraction form
    1,664.21/2,296.62 = 918.14/x
  3. Step 3: Cross multiply
    1,664.21x = 2,296.62 × 918.14
  4. Step 4: Simplify right side
    1,664.21x = 2,108,607.20
  5. Step 5: Solve for x
    x = 2,108,607.20/1,664.21
  6. Step 6: Final answer
    x = 1,267.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.