Home / 1,291.20-1,925.46-1,279.50

Finding the Fourth Proportional to 1,291.20, 1,925.46 and 1,279.50

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Solution

The fourth proportional to 1,291.20, 1,925.46 and 1,279.50 is: 1,908.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.20 : 1,925.46 = 1,279.50 : x
  2. Step 2: Convert to fraction form
    1,291.20/1,925.46 = 1,279.50/x
  3. Step 3: Cross multiply
    1,291.20x = 1,925.46 × 1,279.50
  4. Step 4: Simplify right side
    1,291.20x = 2,463,626.07
  5. Step 5: Solve for x
    x = 2,463,626.07/1,291.20
  6. Step 6: Final answer
    x = 1,908.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.