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Finding the Fourth Proportional to 2,869.62, 4,303.49 and 921.35

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Solution

The fourth proportional to 2,869.62, 4,303.49 and 921.35 is: 1,381.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,869.62 : 4,303.49 = 921.35 : x
  2. Step 2: Convert to fraction form
    2,869.62/4,303.49 = 921.35/x
  3. Step 3: Cross multiply
    2,869.62x = 4,303.49 × 921.35
  4. Step 4: Simplify right side
    2,869.62x = 3,964,994.39
  5. Step 5: Solve for x
    x = 3,964,994.39/2,869.62
  6. Step 6: Final answer
    x = 1,381.71

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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.