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Finding the Fourth Proportional to 1,606.72, 2,408.14 and 783.76

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Solution

The fourth proportional to 1,606.72, 2,408.14 and 783.76 is: 1,174.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,606.72 : 2,408.14 = 783.76 : x
  2. Step 2: Convert to fraction form
    1,606.72/2,408.14 = 783.76/x
  3. Step 3: Cross multiply
    1,606.72x = 2,408.14 × 783.76
  4. Step 4: Simplify right side
    1,606.72x = 1,887,403.81
  5. Step 5: Solve for x
    x = 1,887,403.81/1,606.72
  6. Step 6: Final answer
    x = 1,174.69

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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.