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Finding the Fourth Proportional to 1,424.51, 2,137.22 and 437.40

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Solution

The fourth proportional to 1,424.51, 2,137.22 and 437.40 is: 656.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.51 : 2,137.22 = 437.40 : x
  2. Step 2: Convert to fraction form
    1,424.51/2,137.22 = 437.40/x
  3. Step 3: Cross multiply
    1,424.51x = 2,137.22 × 437.40
  4. Step 4: Simplify right side
    1,424.51x = 934,821.33
  5. Step 5: Solve for x
    x = 934,821.33/1,424.51
  6. Step 6: Final answer
    x = 656.24

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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.