Home / 1,890.43-2,607.80-1,284.55

Finding the Fourth Proportional to 1,890.43, 2,607.80 and 1,284.55

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Solution

The fourth proportional to 1,890.43, 2,607.80 and 1,284.55 is: 1,772.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.43 : 2,607.80 = 1,284.55 : x
  2. Step 2: Convert to fraction form
    1,890.43/2,607.80 = 1,284.55/x
  3. Step 3: Cross multiply
    1,890.43x = 2,607.80 × 1,284.55
  4. Step 4: Simplify right side
    1,890.43x = 3,349,836.55
  5. Step 5: Solve for x
    x = 3,349,836.55/1,890.43
  6. Step 6: Final answer
    x = 1,772.00

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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.