Home / 1,260.36-1,890.47-438.55

Finding the Fourth Proportional to 1,260.36, 1,890.47 and 438.55

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Solution

The fourth proportional to 1,260.36, 1,890.47 and 438.55 is: 657.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.36 : 1,890.47 = 438.55 : x
  2. Step 2: Convert to fraction form
    1,260.36/1,890.47 = 438.55/x
  3. Step 3: Cross multiply
    1,260.36x = 1,890.47 × 438.55
  4. Step 4: Simplify right side
    1,260.36x = 829,061.99
  5. Step 5: Solve for x
    x = 829,061.99/1,260.36
  6. Step 6: Final answer
    x = 657.80

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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.