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Finding the Fourth Proportional to 2,885.21, 4,327.35 and 805.00

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Solution

The fourth proportional to 2,885.21, 4,327.35 and 805.00 is: 1,207.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,885.21 : 4,327.35 = 805.00 : x
  2. Step 2: Convert to fraction form
    2,885.21/4,327.35 = 805.00/x
  3. Step 3: Cross multiply
    2,885.21x = 4,327.35 × 805.00
  4. Step 4: Simplify right side
    2,885.21x = 3,483,495.11
  5. Step 5: Solve for x
    x = 3,483,495.11/2,885.21
  6. Step 6: Final answer
    x = 1,207.36

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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.