Home / 1,378.21-1,904.58-1,024.64

Finding the Fourth Proportional to 1,378.21, 1,904.58 and 1,024.64

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Solution

The fourth proportional to 1,378.21, 1,904.58 and 1,024.64 is: 1,415.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.21 : 1,904.58 = 1,024.64 : x
  2. Step 2: Convert to fraction form
    1,378.21/1,904.58 = 1,024.64/x
  3. Step 3: Cross multiply
    1,378.21x = 1,904.58 × 1,024.64
  4. Step 4: Simplify right side
    1,378.21x = 1,951,508.85
  5. Step 5: Solve for x
    x = 1,951,508.85/1,378.21
  6. Step 6: Final answer
    x = 1,415.98

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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.