Home / 1,267.10-1,899.30-486.80

Finding the Fourth Proportional to 1,267.10, 1,899.30 and 486.80

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Solution

The fourth proportional to 1,267.10, 1,899.30 and 486.80 is: 729.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.10 : 1,899.30 = 486.80 : x
  2. Step 2: Convert to fraction form
    1,267.10/1,899.30 = 486.80/x
  3. Step 3: Cross multiply
    1,267.10x = 1,899.30 × 486.80
  4. Step 4: Simplify right side
    1,267.10x = 924,579.24
  5. Step 5: Solve for x
    x = 924,579.24/1,267.10
  6. Step 6: Final answer
    x = 729.68

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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.