Home / 1,267.30-1,748.88-707.80

Finding the Fourth Proportional to 1,267.30, 1,748.88 and 707.80

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Solution

The fourth proportional to 1,267.30, 1,748.88 and 707.80 is: 976.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.30 : 1,748.88 = 707.80 : x
  2. Step 2: Convert to fraction form
    1,267.30/1,748.88 = 707.80/x
  3. Step 3: Cross multiply
    1,267.30x = 1,748.88 × 707.80
  4. Step 4: Simplify right side
    1,267.30x = 1,237,857.26
  5. Step 5: Solve for x
    x = 1,237,857.26/1,267.30
  6. Step 6: Final answer
    x = 976.77

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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.