Home / 2,215.23-3,056.60-1,386.75

Finding the Fourth Proportional to 2,215.23, 3,056.60 and 1,386.75

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Solution

The fourth proportional to 2,215.23, 3,056.60 and 1,386.75 is: 1,913.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.23 : 3,056.60 = 1,386.75 : x
  2. Step 2: Convert to fraction form
    2,215.23/3,056.60 = 1,386.75/x
  3. Step 3: Cross multiply
    2,215.23x = 3,056.60 × 1,386.75
  4. Step 4: Simplify right side
    2,215.23x = 4,238,733.12
  5. Step 5: Solve for x
    x = 4,238,733.12/2,215.23
  6. Step 6: Final answer
    x = 1,913.45

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Half scale
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Double scale
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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.