Home / 2,927.10-4,390.70-979.32

Finding the Fourth Proportional to 2,927.10, 4,390.70 and 979.32

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Solution

The fourth proportional to 2,927.10, 4,390.70 and 979.32 is: 1,469.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,927.10 : 4,390.70 = 979.32 : x
  2. Step 2: Convert to fraction form
    2,927.10/4,390.70 = 979.32/x
  3. Step 3: Cross multiply
    2,927.10x = 4,390.70 × 979.32
  4. Step 4: Simplify right side
    2,927.10x = 4,299,900.32
  5. Step 5: Solve for x
    x = 4,299,900.32/2,927.10
  6. Step 6: Final answer
    x = 1,469.00

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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.