Home / 1,923.90-2,656.40-1,178.88

Finding the Fourth Proportional to 1,923.90, 2,656.40 and 1,178.88

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Solution

The fourth proportional to 1,923.90, 2,656.40 and 1,178.88 is: 1,627.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,923.90 : 2,656.40 = 1,178.88 : x
  2. Step 2: Convert to fraction form
    1,923.90/2,656.40 = 1,178.88/x
  3. Step 3: Cross multiply
    1,923.90x = 2,656.40 × 1,178.88
  4. Step 4: Simplify right side
    1,923.90x = 3,131,570.94
  5. Step 5: Solve for x
    x = 3,131,570.94/1,923.90
  6. Step 6: Final answer
    x = 1,627.72

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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.