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Finding the Fourth Proportional to 1,442.90, 2,163.87 and 577.01

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Solution

The fourth proportional to 1,442.90, 2,163.87 and 577.01 is: 865.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.90 : 2,163.87 = 577.01 : x
  2. Step 2: Convert to fraction form
    1,442.90/2,163.87 = 577.01/x
  3. Step 3: Cross multiply
    1,442.90x = 2,163.87 × 577.01
  4. Step 4: Simplify right side
    1,442.90x = 1,248,563.81
  5. Step 5: Solve for x
    x = 1,248,563.81/1,442.90
  6. Step 6: Final answer
    x = 865.32

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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.