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Finding the Fourth Proportional to 1,518.90, 2,095.95 and 855.61

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Solution

The fourth proportional to 1,518.90, 2,095.95 and 855.61 is: 1,180.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.90 : 2,095.95 = 855.61 : x
  2. Step 2: Convert to fraction form
    1,518.90/2,095.95 = 855.61/x
  3. Step 3: Cross multiply
    1,518.90x = 2,095.95 × 855.61
  4. Step 4: Simplify right side
    1,518.90x = 1,793,315.78
  5. Step 5: Solve for x
    x = 1,793,315.78/1,518.90
  6. Step 6: Final answer
    x = 1,180.67

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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.