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Finding the Fourth Proportional to 2,999.72, 4,139.51 and 1,636.93

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Solution

The fourth proportional to 2,999.72, 4,139.51 and 1,636.93 is: 2,258.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,999.72 : 4,139.51 = 1,636.93 : x
  2. Step 2: Convert to fraction form
    2,999.72/4,139.51 = 1,636.93/x
  3. Step 3: Cross multiply
    2,999.72x = 4,139.51 × 1,636.93
  4. Step 4: Simplify right side
    2,999.72x = 6,776,088.10
  5. Step 5: Solve for x
    x = 6,776,088.10/2,999.72
  6. Step 6: Final answer
    x = 2,258.91

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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.