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Finding the Fourth Proportional to 1,384.10, 2,074.76 and 505.89

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Solution

The fourth proportional to 1,384.10, 2,074.76 and 505.89 is: 758.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.10 : 2,074.76 = 505.89 : x
  2. Step 2: Convert to fraction form
    1,384.10/2,074.76 = 505.89/x
  3. Step 3: Cross multiply
    1,384.10x = 2,074.76 × 505.89
  4. Step 4: Simplify right side
    1,384.10x = 1,049,587.43
  5. Step 5: Solve for x
    x = 1,049,587.43/1,384.10
  6. Step 6: Final answer
    x = 758.32

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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.