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Finding the Fourth Proportional to 2,858.07, 3,943.85 and 1,678.71

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Solution

The fourth proportional to 2,858.07, 3,943.85 and 1,678.71 is: 2,316.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.07 : 3,943.85 = 1,678.71 : x
  2. Step 2: Convert to fraction form
    2,858.07/3,943.85 = 1,678.71/x
  3. Step 3: Cross multiply
    2,858.07x = 3,943.85 × 1,678.71
  4. Step 4: Simplify right side
    2,858.07x = 6,620,572.04
  5. Step 5: Solve for x
    x = 6,620,572.04/2,858.07
  6. Step 6: Final answer
    x = 2,316.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.