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Finding the Fourth Proportional to 3,218.76, 4,445.52 and 2,169

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Solution

The fourth proportional to 3,218.76, 4,445.52 and 2,169 is: 2,995.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.76 : 4,445.52 = 2,169 : x
  2. Step 2: Convert to fraction form
    3,218.76/4,445.52 = 2,169/x
  3. Step 3: Cross multiply
    3,218.76x = 4,445.52 × 2,169
  4. Step 4: Simplify right side
    3,218.76x = 9,642,332.88
  5. Step 5: Solve for x
    x = 9,642,332.88/3,218.76
  6. Step 6: Final answer
    x = 2,995.67

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Half scale
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Double scale
Find fourth proportional to 3,219.76, 4,446.90 and 2,170
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.