Home / 3,218.81-4,437.68-2,890.76

Finding the Fourth Proportional to 3,218.81, 4,437.68 and 2,890.76

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Solution

The fourth proportional to 3,218.81, 4,437.68 and 2,890.76 is: 3,985.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.81 : 4,437.68 = 2,890.76 : x
  2. Step 2: Convert to fraction form
    3,218.81/4,437.68 = 2,890.76/x
  3. Step 3: Cross multiply
    3,218.81x = 4,437.68 × 2,890.76
  4. Step 4: Simplify right side
    3,218.81x = 12,828,231.19
  5. Step 5: Solve for x
    x = 12,828,231.19/3,218.81
  6. Step 6: Final answer
    x = 3,985.40

Related Problems

Find fourth proportional to 1,609.40, 2,218.84 and 1,445.38
Half scale
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Double scale
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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.