Home / 1,766.21-2,431.80-1,345.20

Finding the Fourth Proportional to 1,766.21, 2,431.80 and 1,345.20

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Solution

The fourth proportional to 1,766.21, 2,431.80 and 1,345.20 is: 1,852.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,766.21 : 2,431.80 = 1,345.20 : x
  2. Step 2: Convert to fraction form
    1,766.21/2,431.80 = 1,345.20/x
  3. Step 3: Cross multiply
    1,766.21x = 2,431.80 × 1,345.20
  4. Step 4: Simplify right side
    1,766.21x = 3,271,257.36
  5. Step 5: Solve for x
    x = 3,271,257.36/1,766.21
  6. Step 6: Final answer
    x = 1,852.14

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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.