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Finding the Fourth Proportional to 2,145, 3,211.26 and 1,526.76

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Solution

The fourth proportional to 2,145, 3,211.26 and 1,526.76 is: 2,285.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145 : 3,211.26 = 1,526.76 : x
  2. Step 2: Convert to fraction form
    2,145/3,211.26 = 1,526.76/x
  3. Step 3: Cross multiply
    2,145x = 3,211.26 × 1,526.76
  4. Step 4: Simplify right side
    2,145x = 4,902,823.32
  5. Step 5: Solve for x
    x = 4,902,823.32/2,145
  6. Step 6: Final answer
    x = 2,285.70

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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.