Home / 1,021.32-1,531.37-493.98

Finding the Fourth Proportional to 1,021.32, 1,531.37 and 493.98

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Solution

The fourth proportional to 1,021.32, 1,531.37 and 493.98 is: 740.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.32 : 1,531.37 = 493.98 : x
  2. Step 2: Convert to fraction form
    1,021.32/1,531.37 = 493.98/x
  3. Step 3: Cross multiply
    1,021.32x = 1,531.37 × 493.98
  4. Step 4: Simplify right side
    1,021.32x = 756,466.15
  5. Step 5: Solve for x
    x = 756,466.15/1,021.32
  6. Step 6: Final answer
    x = 740.67

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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.