Home / 2,910.75-4,364.80-830.25

Finding the Fourth Proportional to 2,910.75, 4,364.80 and 830.25

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Solution

The fourth proportional to 2,910.75, 4,364.80 and 830.25 is: 1,245.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,910.75 : 4,364.80 = 830.25 : x
  2. Step 2: Convert to fraction form
    2,910.75/4,364.80 = 830.25/x
  3. Step 3: Cross multiply
    2,910.75x = 4,364.80 × 830.25
  4. Step 4: Simplify right side
    2,910.75x = 3,623,877.79
  5. Step 5: Solve for x
    x = 3,623,877.79/2,910.75
  6. Step 6: Final answer
    x = 1,245.00

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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.