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Finding the Fourth Proportional to 839.48, 1,158.46 and 466.44

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Solution

The fourth proportional to 839.48, 1,158.46 and 466.44 is: 643.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.48 : 1,158.46 = 466.44 : x
  2. Step 2: Convert to fraction form
    839.48/1,158.46 = 466.44/x
  3. Step 3: Cross multiply
    839.48x = 1,158.46 × 466.44
  4. Step 4: Simplify right side
    839.48x = 540,352.08
  5. Step 5: Solve for x
    x = 540,352.08/839.48
  6. Step 6: Final answer
    x = 643.67

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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.