Home / 3,115.51-4,674.39-1,555.39

Finding the Fourth Proportional to 3,115.51, 4,674.39 and 1,555.39

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Solution

The fourth proportional to 3,115.51, 4,674.39 and 1,555.39 is: 2,333.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.51 : 4,674.39 = 1,555.39 : x
  2. Step 2: Convert to fraction form
    3,115.51/4,674.39 = 1,555.39/x
  3. Step 3: Cross multiply
    3,115.51x = 4,674.39 × 1,555.39
  4. Step 4: Simplify right side
    3,115.51x = 7,270,499.46
  5. Step 5: Solve for x
    x = 7,270,499.46/3,115.51
  6. Step 6: Final answer
    x = 2,333.65

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Double scale
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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.