Home / 1,851.90-2,555.38-1,223.64

Finding the Fourth Proportional to 1,851.90, 2,555.38 and 1,223.64

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Solution

The fourth proportional to 1,851.90, 2,555.38 and 1,223.64 is: 1,688.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.90 : 2,555.38 = 1,223.64 : x
  2. Step 2: Convert to fraction form
    1,851.90/2,555.38 = 1,223.64/x
  3. Step 3: Cross multiply
    1,851.90x = 2,555.38 × 1,223.64
  4. Step 4: Simplify right side
    1,851.90x = 3,126,866.71
  5. Step 5: Solve for x
    x = 3,126,866.71/1,851.90
  6. Step 6: Final answer
    x = 1,688.47

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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.