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Finding the Fourth Proportional to 1,330.03, 1,994.91 and 841.60

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Solution

The fourth proportional to 1,330.03, 1,994.91 and 841.60 is: 1,262.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.03 : 1,994.91 = 841.60 : x
  2. Step 2: Convert to fraction form
    1,330.03/1,994.91 = 841.60/x
  3. Step 3: Cross multiply
    1,330.03x = 1,994.91 × 841.60
  4. Step 4: Simplify right side
    1,330.03x = 1,678,916.26
  5. Step 5: Solve for x
    x = 1,678,916.26/1,330.03
  6. Step 6: Final answer
    x = 1,262.31

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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.