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Finding the Fourth Proportional to 1,465.89, 2,199.35 and 644.75

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Solution

The fourth proportional to 1,465.89, 2,199.35 and 644.75 is: 967.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,465.89 : 2,199.35 = 644.75 : x
  2. Step 2: Convert to fraction form
    1,465.89/2,199.35 = 644.75/x
  3. Step 3: Cross multiply
    1,465.89x = 2,199.35 × 644.75
  4. Step 4: Simplify right side
    1,465.89x = 1,418,033.19
  5. Step 5: Solve for x
    x = 1,418,033.19/1,465.89
  6. Step 6: Final answer
    x = 967.35

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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.