Home / 1,856.16-2,560.40-1,388.96

Finding the Fourth Proportional to 1,856.16, 2,560.40 and 1,388.96

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Solution

The fourth proportional to 1,856.16, 2,560.40 and 1,388.96 is: 1,915.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,856.16 : 2,560.40 = 1,388.96 : x
  2. Step 2: Convert to fraction form
    1,856.16/2,560.40 = 1,388.96/x
  3. Step 3: Cross multiply
    1,856.16x = 2,560.40 × 1,388.96
  4. Step 4: Simplify right side
    1,856.16x = 3,556,293.18
  5. Step 5: Solve for x
    x = 3,556,293.18/1,856.16
  6. Step 6: Final answer
    x = 1,915.94

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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.