Home / 1,929.12-2,890.56-1,108.32

Finding the Fourth Proportional to 1,929.12, 2,890.56 and 1,108.32

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Solution

The fourth proportional to 1,929.12, 2,890.56 and 1,108.32 is: 1,660.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.12 : 2,890.56 = 1,108.32 : x
  2. Step 2: Convert to fraction form
    1,929.12/2,890.56 = 1,108.32/x
  3. Step 3: Cross multiply
    1,929.12x = 2,890.56 × 1,108.32
  4. Step 4: Simplify right side
    1,929.12x = 3,203,665.46
  5. Step 5: Solve for x
    x = 3,203,665.46/1,929.12
  6. Step 6: Final answer
    x = 1,660.69

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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.