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Finding the Fourth Proportional to 841.85, 1,262.07 and 660.05

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Solution

The fourth proportional to 841.85, 1,262.07 and 660.05 is: 989.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.85 : 1,262.07 = 660.05 : x
  2. Step 2: Convert to fraction form
    841.85/1,262.07 = 660.05/x
  3. Step 3: Cross multiply
    841.85x = 1,262.07 × 660.05
  4. Step 4: Simplify right side
    841.85x = 833,022.99
  5. Step 5: Solve for x
    x = 833,022.99/841.85
  6. Step 6: Final answer
    x = 989.52

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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.