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Finding the Fourth Proportional to 1,431.92, 2,147.03 and 507.30

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Solution

The fourth proportional to 1,431.92, 2,147.03 and 507.30 is: 760.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.92 : 2,147.03 = 507.30 : x
  2. Step 2: Convert to fraction form
    1,431.92/2,147.03 = 507.30/x
  3. Step 3: Cross multiply
    1,431.92x = 2,147.03 × 507.30
  4. Step 4: Simplify right side
    1,431.92x = 1,089,185.78
  5. Step 5: Solve for x
    x = 1,089,185.78/1,431.92
  6. Step 6: Final answer
    x = 760.65

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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.