Home / 1,442.37-1,989.45-1,000.38

Finding the Fourth Proportional to 1,442.37, 1,989.45 and 1,000.38

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Solution

The fourth proportional to 1,442.37, 1,989.45 and 1,000.38 is: 1,379.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.37 : 1,989.45 = 1,000.38 : x
  2. Step 2: Convert to fraction form
    1,442.37/1,989.45 = 1,000.38/x
  3. Step 3: Cross multiply
    1,442.37x = 1,989.45 × 1,000.38
  4. Step 4: Simplify right side
    1,442.37x = 1,990,205.99
  5. Step 5: Solve for x
    x = 1,990,205.99/1,442.37
  6. Step 6: Final answer
    x = 1,379.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.