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Finding the Fourth Proportional to 2,116.40, 3,174.58 and 577.40

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Solution

The fourth proportional to 2,116.40, 3,174.58 and 577.40 is: 866.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.40 : 3,174.58 = 577.40 : x
  2. Step 2: Convert to fraction form
    2,116.40/3,174.58 = 577.40/x
  3. Step 3: Cross multiply
    2,116.40x = 3,174.58 × 577.40
  4. Step 4: Simplify right side
    2,116.40x = 1,833,002.49
  5. Step 5: Solve for x
    x = 1,833,002.49/2,116.40
  6. Step 6: Final answer
    x = 866.09

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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.