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Finding the Fourth Proportional to 1,447.75, 2,172.60 and 535.75

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Solution

The fourth proportional to 1,447.75, 2,172.60 and 535.75 is: 803.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.75 : 2,172.60 = 535.75 : x
  2. Step 2: Convert to fraction form
    1,447.75/2,172.60 = 535.75/x
  3. Step 3: Cross multiply
    1,447.75x = 2,172.60 × 535.75
  4. Step 4: Simplify right side
    1,447.75x = 1,163,967.77
  5. Step 5: Solve for x
    x = 1,163,967.77/1,447.75
  6. Step 6: Final answer
    x = 803.98

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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.