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Finding the Fourth Proportional to 455,240.86, 628,106.60 and 261,638.51

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Solution

The fourth proportional to 455,240.86, 628,106.60 and 261,638.51 is: 360,988.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,240.86 : 628,106.60 = 261,638.51 : x
  2. Step 2: Convert to fraction form
    455,240.86/628,106.60 = 261,638.51/x
  3. Step 3: Cross multiply
    455,240.86x = 628,106.60 × 261,638.51
  4. Step 4: Simplify right side
    455,240.86x = 164,336,872,458.73
  5. Step 5: Solve for x
    x = 164,336,872,458.73/455,240.86
  6. Step 6: Final answer
    x = 360,988.85

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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.