Home / 2,926.49-4,389.74-978.70

Finding the Fourth Proportional to 2,926.49, 4,389.74 and 978.70

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Solution

The fourth proportional to 2,926.49, 4,389.74 and 978.70 is: 1,468.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,926.49 : 4,389.74 = 978.70 : x
  2. Step 2: Convert to fraction form
    2,926.49/4,389.74 = 978.70/x
  3. Step 3: Cross multiply
    2,926.49x = 4,389.74 × 978.70
  4. Step 4: Simplify right side
    2,926.49x = 4,296,238.54
  5. Step 5: Solve for x
    x = 4,296,238.54/2,926.49
  6. Step 6: Final answer
    x = 1,468.05

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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.