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Finding the Fourth Proportional to 255,415.94, 382,885.73 and 86,821.05

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Solution

The fourth proportional to 255,415.94, 382,885.73 and 86,821.05 is: 130,150.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,415.94 : 382,885.73 = 86,821.05 : x
  2. Step 2: Convert to fraction form
    255,415.94/382,885.73 = 86,821.05/x
  3. Step 3: Cross multiply
    255,415.94x = 382,885.73 × 86,821.05
  4. Step 4: Simplify right side
    255,415.94x = 33,242,541,108.62
  5. Step 5: Solve for x
    x = 33,242,541,108.62/255,415.94
  6. Step 6: Final answer
    x = 130,150.61

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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.