Home / 2,782.65-4,190.48-2,421.80

Finding the Fourth Proportional to 2,782.65, 4,190.48 and 2,421.80

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Solution

The fourth proportional to 2,782.65, 4,190.48 and 2,421.80 is: 3,647.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,782.65 : 4,190.48 = 2,421.80 : x
  2. Step 2: Convert to fraction form
    2,782.65/4,190.48 = 2,421.80/x
  3. Step 3: Cross multiply
    2,782.65x = 4,190.48 × 2,421.80
  4. Step 4: Simplify right side
    2,782.65x = 10,148,483.51
  5. Step 5: Solve for x
    x = 10,148,483.51/2,782.65
  6. Step 6: Final answer
    x = 3,647.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.