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Finding the Fourth Proportional to 2,856.51, 3,942.65 and 1,860.06

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Solution

The fourth proportional to 2,856.51, 3,942.65 and 1,860.06 is: 2,567.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.51 : 3,942.65 = 1,860.06 : x
  2. Step 2: Convert to fraction form
    2,856.51/3,942.65 = 1,860.06/x
  3. Step 3: Cross multiply
    2,856.51x = 3,942.65 × 1,860.06
  4. Step 4: Simplify right side
    2,856.51x = 7,333,565.56
  5. Step 5: Solve for x
    x = 7,333,565.56/2,856.51
  6. Step 6: Final answer
    x = 2,567.32

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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.