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Finding the Fourth Proportional to 1,431.59, 2,147.11 and 507.11

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Solution

The fourth proportional to 1,431.59, 2,147.11 and 507.11 is: 760.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.59 : 2,147.11 = 507.11 : x
  2. Step 2: Convert to fraction form
    1,431.59/2,147.11 = 507.11/x
  3. Step 3: Cross multiply
    1,431.59x = 2,147.11 × 507.11
  4. Step 4: Simplify right side
    1,431.59x = 1,088,808.95
  5. Step 5: Solve for x
    x = 1,088,808.95/1,431.59
  6. Step 6: Final answer
    x = 760.56

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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.