Home / 2,972.03-4,458.07-780.98

Finding the Fourth Proportional to 2,972.03, 4,458.07 and 780.98

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Solution

The fourth proportional to 2,972.03, 4,458.07 and 780.98 is: 1,171.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,972.03 : 4,458.07 = 780.98 : x
  2. Step 2: Convert to fraction form
    2,972.03/4,458.07 = 780.98/x
  3. Step 3: Cross multiply
    2,972.03x = 4,458.07 × 780.98
  4. Step 4: Simplify right side
    2,972.03x = 3,481,641.22
  5. Step 5: Solve for x
    x = 3,481,641.22/2,972.03
  6. Step 6: Final answer
    x = 1,171.47

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1.5x scale

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.