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Finding the Fourth Proportional to 2,113.55, 3,170.72 and 652.36

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Solution

The fourth proportional to 2,113.55, 3,170.72 and 652.36 is: 978.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.55 : 3,170.72 = 652.36 : x
  2. Step 2: Convert to fraction form
    2,113.55/3,170.72 = 652.36/x
  3. Step 3: Cross multiply
    2,113.55x = 3,170.72 × 652.36
  4. Step 4: Simplify right side
    2,113.55x = 2,068,434.38
  5. Step 5: Solve for x
    x = 2,068,434.38/2,113.55
  6. Step 6: Final answer
    x = 978.66

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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.