Home / 1,290.15-1,943.45-1,178.07

Finding the Fourth Proportional to 1,290.15, 1,943.45 and 1,178.07

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Solution

The fourth proportional to 1,290.15, 1,943.45 and 1,178.07 is: 1,774.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.15 : 1,943.45 = 1,178.07 : x
  2. Step 2: Convert to fraction form
    1,290.15/1,943.45 = 1,178.07/x
  3. Step 3: Cross multiply
    1,290.15x = 1,943.45 × 1,178.07
  4. Step 4: Simplify right side
    1,290.15x = 2,289,511.38
  5. Step 5: Solve for x
    x = 2,289,511.38/1,290.15
  6. Step 6: Final answer
    x = 1,774.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.