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Finding the Fourth Proportional to 1,449.83, 2,172.62 and 900.35

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Solution

The fourth proportional to 1,449.83, 2,172.62 and 900.35 is: 1,349.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.83 : 2,172.62 = 900.35 : x
  2. Step 2: Convert to fraction form
    1,449.83/2,172.62 = 900.35/x
  3. Step 3: Cross multiply
    1,449.83x = 2,172.62 × 900.35
  4. Step 4: Simplify right side
    1,449.83x = 1,956,117.95
  5. Step 5: Solve for x
    x = 1,956,117.95/1,449.83
  6. Step 6: Final answer
    x = 1,349.20

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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.