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Finding the Fourth Proportional to 2,170, 3,254.12 and 782.92

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Solution

The fourth proportional to 2,170, 3,254.12 and 782.92 is: 1,174.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170 : 3,254.12 = 782.92 : x
  2. Step 2: Convert to fraction form
    2,170/3,254.12 = 782.92/x
  3. Step 3: Cross multiply
    2,170x = 3,254.12 × 782.92
  4. Step 4: Simplify right side
    2,170x = 2,547,715.63
  5. Step 5: Solve for x
    x = 2,547,715.63/2,170
  6. Step 6: Final answer
    x = 1,174.06

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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.