Home / 1,259.89-1,890.24-438.55

Finding the Fourth Proportional to 1,259.89, 1,890.24 and 438.55

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Solution

The fourth proportional to 1,259.89, 1,890.24 and 438.55 is: 657.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259.89 : 1,890.24 = 438.55 : x
  2. Step 2: Convert to fraction form
    1,259.89/1,890.24 = 438.55/x
  3. Step 3: Cross multiply
    1,259.89x = 1,890.24 × 438.55
  4. Step 4: Simplify right side
    1,259.89x = 828,964.75
  5. Step 5: Solve for x
    x = 828,964.75/1,259.89
  6. Step 6: Final answer
    x = 657.97

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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.