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Finding the Fourth Proportional to 258,829.20, 388,128.60 and 118,630.80

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Solution

The fourth proportional to 258,829.20, 388,128.60 and 118,630.80 is: 177,893.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,829.20 : 388,128.60 = 118,630.80 : x
  2. Step 2: Convert to fraction form
    258,829.20/388,128.60 = 118,630.80/x
  3. Step 3: Cross multiply
    258,829.20x = 388,128.60 × 118,630.80
  4. Step 4: Simplify right side
    258,829.20x = 46,044,006,320.88
  5. Step 5: Solve for x
    x = 46,044,006,320.88/258,829.20
  6. Step 6: Final answer
    x = 177,893.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.