Home / 1,281.91-1,922.39-459.98

Finding the Fourth Proportional to 1,281.91, 1,922.39 and 459.98

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Solution

The fourth proportional to 1,281.91, 1,922.39 and 459.98 is: 689.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.91 : 1,922.39 = 459.98 : x
  2. Step 2: Convert to fraction form
    1,281.91/1,922.39 = 459.98/x
  3. Step 3: Cross multiply
    1,281.91x = 1,922.39 × 459.98
  4. Step 4: Simplify right side
    1,281.91x = 884,258.65
  5. Step 5: Solve for x
    x = 884,258.65/1,281.91
  6. Step 6: Final answer
    x = 689.80

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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.