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Finding the Fourth Proportional to 1,670.10, 2,502.20 and 1,489.10

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Solution

The fourth proportional to 1,670.10, 2,502.20 and 1,489.10 is: 2,231.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.10 : 2,502.20 = 1,489.10 : x
  2. Step 2: Convert to fraction form
    1,670.10/2,502.20 = 1,489.10/x
  3. Step 3: Cross multiply
    1,670.10x = 2,502.20 × 1,489.10
  4. Step 4: Simplify right side
    1,670.10x = 3,726,026.02
  5. Step 5: Solve for x
    x = 3,726,026.02/1,670.10
  6. Step 6: Final answer
    x = 2,231.02

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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.