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Finding the Fourth Proportional to 1,487.19, 2,051.46 and 963.21

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Solution

The fourth proportional to 1,487.19, 2,051.46 and 963.21 is: 1,328.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.19 : 2,051.46 = 963.21 : x
  2. Step 2: Convert to fraction form
    1,487.19/2,051.46 = 963.21/x
  3. Step 3: Cross multiply
    1,487.19x = 2,051.46 × 963.21
  4. Step 4: Simplify right side
    1,487.19x = 1,975,986.79
  5. Step 5: Solve for x
    x = 1,975,986.79/1,487.19
  6. Step 6: Final answer
    x = 1,328.67

Related Problems

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Half scale
Find fourth proportional to 2,974.38, 4,102.92 and 1,926.42
Double scale
Find fourth proportional to 1,488.19, 2,052.84 and 964.21
Similar ratio
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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.