Home / 1,856.12-2,556.78-1,357.40

Finding the Fourth Proportional to 1,856.12, 2,556.78 and 1,357.40

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Solution

The fourth proportional to 1,856.12, 2,556.78 and 1,357.40 is: 1,869.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,856.12 : 2,556.78 = 1,357.40 : x
  2. Step 2: Convert to fraction form
    1,856.12/2,556.78 = 1,357.40/x
  3. Step 3: Cross multiply
    1,856.12x = 2,556.78 × 1,357.40
  4. Step 4: Simplify right side
    1,856.12x = 3,470,573.17
  5. Step 5: Solve for x
    x = 3,470,573.17/1,856.12
  6. Step 6: Final answer
    x = 1,869.80

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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.