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Finding the Fourth Proportional to 1,324.45, 1,986.08 and 776.89

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Solution

The fourth proportional to 1,324.45, 1,986.08 and 776.89 is: 1,164.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.45 : 1,986.08 = 776.89 : x
  2. Step 2: Convert to fraction form
    1,324.45/1,986.08 = 776.89/x
  3. Step 3: Cross multiply
    1,324.45x = 1,986.08 × 776.89
  4. Step 4: Simplify right side
    1,324.45x = 1,542,955.76
  5. Step 5: Solve for x
    x = 1,542,955.76/1,324.45
  6. Step 6: Final answer
    x = 1,164.98

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1.5x scale

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.