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Finding the Fourth Proportional to 451,237.36, 622,640.28 and 279,328.24

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Solution

The fourth proportional to 451,237.36, 622,640.28 and 279,328.24 is: 385,431.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,237.36 : 622,640.28 = 279,328.24 : x
  2. Step 2: Convert to fraction form
    451,237.36/622,640.28 = 279,328.24/x
  3. Step 3: Cross multiply
    451,237.36x = 622,640.28 × 279,328.24
  4. Step 4: Simplify right side
    451,237.36x = 173,921,013,565.51
  5. Step 5: Solve for x
    x = 173,921,013,565.51/451,237.36
  6. Step 6: Final answer
    x = 385,431.33

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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.