Home / 1,675.12-2,312.64-1,208.56

Finding the Fourth Proportional to 1,675.12, 2,312.64 and 1,208.56

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Solution

The fourth proportional to 1,675.12, 2,312.64 and 1,208.56 is: 1,668.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,675.12 : 2,312.64 = 1,208.56 : x
  2. Step 2: Convert to fraction form
    1,675.12/2,312.64 = 1,208.56/x
  3. Step 3: Cross multiply
    1,675.12x = 2,312.64 × 1,208.56
  4. Step 4: Simplify right side
    1,675.12x = 2,794,964.20
  5. Step 5: Solve for x
    x = 2,794,964.20/1,675.12
  6. Step 6: Final answer
    x = 1,668.52

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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.