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Finding the Fourth Proportional to 1,948.85, 2,923.16 and 853.21

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Solution

The fourth proportional to 1,948.85, 2,923.16 and 853.21 is: 1,279.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,948.85 : 2,923.16 = 853.21 : x
  2. Step 2: Convert to fraction form
    1,948.85/2,923.16 = 853.21/x
  3. Step 3: Cross multiply
    1,948.85x = 2,923.16 × 853.21
  4. Step 4: Simplify right side
    1,948.85x = 2,494,068.73
  5. Step 5: Solve for x
    x = 2,494,068.73/1,948.85
  6. Step 6: Final answer
    x = 1,279.77

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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.