Home / 3,112.16-4,669.15-920.95

Finding the Fourth Proportional to 3,112.16, 4,669.15 and 920.95

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Solution

The fourth proportional to 3,112.16, 4,669.15 and 920.95 is: 1,381.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.16 : 4,669.15 = 920.95 : x
  2. Step 2: Convert to fraction form
    3,112.16/4,669.15 = 920.95/x
  3. Step 3: Cross multiply
    3,112.16x = 4,669.15 × 920.95
  4. Step 4: Simplify right side
    3,112.16x = 4,300,030.35
  5. Step 5: Solve for x
    x = 4,300,030.35/3,112.16
  6. Step 6: Final answer
    x = 1,381.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.