Home / 1,038.11-1,556.26-490.45

Finding the Fourth Proportional to 1,038.11, 1,556.26 and 490.45

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Solution

The fourth proportional to 1,038.11, 1,556.26 and 490.45 is: 735.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.11 : 1,556.26 = 490.45 : x
  2. Step 2: Convert to fraction form
    1,038.11/1,556.26 = 490.45/x
  3. Step 3: Cross multiply
    1,038.11x = 1,556.26 × 490.45
  4. Step 4: Simplify right side
    1,038.11x = 763,265.26
  5. Step 5: Solve for x
    x = 763,265.26/1,038.11
  6. Step 6: Final answer
    x = 735.25

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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.