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Finding the Fourth Proportional to 641.42, 888.62 and 626.30

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Solution

The fourth proportional to 641.42, 888.62 and 626.30 is: 867.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.42 : 888.62 = 626.30 : x
  2. Step 2: Convert to fraction form
    641.42/888.62 = 626.30/x
  3. Step 3: Cross multiply
    641.42x = 888.62 × 626.30
  4. Step 4: Simplify right side
    641.42x = 556,542.71
  5. Step 5: Solve for x
    x = 556,542.71/641.42
  6. Step 6: Final answer
    x = 867.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.