Home / 2,220.92-3,065.10-1,289.36

Finding the Fourth Proportional to 2,220.92, 3,065.10 and 1,289.36

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Solution

The fourth proportional to 2,220.92, 3,065.10 and 1,289.36 is: 1,779.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.92 : 3,065.10 = 1,289.36 : x
  2. Step 2: Convert to fraction form
    2,220.92/3,065.10 = 1,289.36/x
  3. Step 3: Cross multiply
    2,220.92x = 3,065.10 × 1,289.36
  4. Step 4: Simplify right side
    2,220.92x = 3,952,017.34
  5. Step 5: Solve for x
    x = 3,952,017.34/2,220.92
  6. Step 6: Final answer
    x = 1,779.45

Related Problems

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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.