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Finding the Fourth Proportional to 846.42, 1,168.23 and 780.54

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Solution

The fourth proportional to 846.42, 1,168.23 and 780.54 is: 1,077.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.42 : 1,168.23 = 780.54 : x
  2. Step 2: Convert to fraction form
    846.42/1,168.23 = 780.54/x
  3. Step 3: Cross multiply
    846.42x = 1,168.23 × 780.54
  4. Step 4: Simplify right side
    846.42x = 911,850.24
  5. Step 5: Solve for x
    x = 911,850.24/846.42
  6. Step 6: Final answer
    x = 1,077.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.