Home / 3,115.10-4,678.05-1,657.10

Finding the Fourth Proportional to 3,115.10, 4,678.05 and 1,657.10

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Solution

The fourth proportional to 3,115.10, 4,678.05 and 1,657.10 is: 2,488.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.10 : 4,678.05 = 1,657.10 : x
  2. Step 2: Convert to fraction form
    3,115.10/4,678.05 = 1,657.10/x
  3. Step 3: Cross multiply
    3,115.10x = 4,678.05 × 1,657.10
  4. Step 4: Simplify right side
    3,115.10x = 7,751,996.66
  5. Step 5: Solve for x
    x = 7,751,996.66/3,115.10
  6. Step 6: Final answer
    x = 2,488.52

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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.