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Finding the Fourth Proportional to 1,431.83, 2,147.73 and 507.44

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Solution

The fourth proportional to 1,431.83, 2,147.73 and 507.44 is: 761.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.83 : 2,147.73 = 507.44 : x
  2. Step 2: Convert to fraction form
    1,431.83/2,147.73 = 507.44/x
  3. Step 3: Cross multiply
    1,431.83x = 2,147.73 × 507.44
  4. Step 4: Simplify right side
    1,431.83x = 1,089,844.11
  5. Step 5: Solve for x
    x = 1,089,844.11/1,431.83
  6. Step 6: Final answer
    x = 761.15

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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.