Home / 2,851.12-4,271.20-1,678.64

Finding the Fourth Proportional to 2,851.12, 4,271.20 and 1,678.64

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Solution

The fourth proportional to 2,851.12, 4,271.20 and 1,678.64 is: 2,514.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,851.12 : 4,271.20 = 1,678.64 : x
  2. Step 2: Convert to fraction form
    2,851.12/4,271.20 = 1,678.64/x
  3. Step 3: Cross multiply
    2,851.12x = 4,271.20 × 1,678.64
  4. Step 4: Simplify right side
    2,851.12x = 7,169,807.17
  5. Step 5: Solve for x
    x = 7,169,807.17/2,851.12
  6. Step 6: Final answer
    x = 2,514.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.