Home / 1,279.37-1,918.98-354.92

Finding the Fourth Proportional to 1,279.37, 1,918.98 and 354.92

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Solution

The fourth proportional to 1,279.37, 1,918.98 and 354.92 is: 532.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.37 : 1,918.98 = 354.92 : x
  2. Step 2: Convert to fraction form
    1,279.37/1,918.98 = 354.92/x
  3. Step 3: Cross multiply
    1,279.37x = 1,918.98 × 354.92
  4. Step 4: Simplify right side
    1,279.37x = 681,074.79
  5. Step 5: Solve for x
    x = 681,074.79/1,279.37
  6. Step 6: Final answer
    x = 532.35

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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.