Home / 2,858.86-3,946-1,680.31

Finding the Fourth Proportional to 2,858.86, 3,946 and 1,680.31

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Solution

The fourth proportional to 2,858.86, 3,946 and 1,680.31 is: 2,319.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.86 : 3,946 = 1,680.31 : x
  2. Step 2: Convert to fraction form
    2,858.86/3,946 = 1,680.31/x
  3. Step 3: Cross multiply
    2,858.86x = 3,946 × 1,680.31
  4. Step 4: Simplify right side
    2,858.86x = 6,630,483.53
  5. Step 5: Solve for x
    x = 6,630,483.53/2,858.86
  6. Step 6: Final answer
    x = 2,319.28

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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.