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Finding the Fourth Proportional to 4,989,978.93, 6,886,175.81 and 2,698,139.01

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Solution

The fourth proportional to 4,989,978.93, 6,886,175.81 and 2,698,139.01 is: 3,723,434.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989,978.93 : 6,886,175.81 = 2,698,139.01 : x
  2. Step 2: Convert to fraction form
    4,989,978.93/6,886,175.81 = 2,698,139.01/x
  3. Step 3: Cross multiply
    4,989,978.93x = 6,886,175.81 × 2,698,139.01
  4. Step 4: Simplify right side
    4,989,978.93x = 18,579,859,569,188.65
  5. Step 5: Solve for x
    x = 18,579,859,569,188.65/4,989,978.93
  6. Step 6: Final answer
    x = 3,723,434.47

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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.