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Finding the Fourth Proportional to 1,588.64, 2,381.68 and 677.28

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Solution

The fourth proportional to 1,588.64, 2,381.68 and 677.28 is: 1,015.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,588.64 : 2,381.68 = 677.28 : x
  2. Step 2: Convert to fraction form
    1,588.64/2,381.68 = 677.28/x
  3. Step 3: Cross multiply
    1,588.64x = 2,381.68 × 677.28
  4. Step 4: Simplify right side
    1,588.64x = 1,613,064.23
  5. Step 5: Solve for x
    x = 1,613,064.23/1,588.64
  6. Step 6: Final answer
    x = 1,015.37

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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.