Home / 1,851.78-2,555.45-1,188.63

Finding the Fourth Proportional to 1,851.78, 2,555.45 and 1,188.63

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Solution

The fourth proportional to 1,851.78, 2,555.45 and 1,188.63 is: 1,640.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.78 : 2,555.45 = 1,188.63 : x
  2. Step 2: Convert to fraction form
    1,851.78/2,555.45 = 1,188.63/x
  3. Step 3: Cross multiply
    1,851.78x = 2,555.45 × 1,188.63
  4. Step 4: Simplify right side
    1,851.78x = 3,037,487.51
  5. Step 5: Solve for x
    x = 3,037,487.51/1,851.78
  6. Step 6: Final answer
    x = 1,640.31

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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.