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Finding the Fourth Proportional to 255,239.67, 382,859.39 and 105,315.12

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Solution

The fourth proportional to 255,239.67, 382,859.39 and 105,315.12 is: 157,972.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,239.67 : 382,859.39 = 105,315.12 : x
  2. Step 2: Convert to fraction form
    255,239.67/382,859.39 = 105,315.12/x
  3. Step 3: Cross multiply
    255,239.67x = 382,859.39 × 105,315.12
  4. Step 4: Simplify right side
    255,239.67x = 40,320,882,074.40
  5. Step 5: Solve for x
    x = 40,320,882,074.40/255,239.67
  6. Step 6: Final answer
    x = 157,972.63

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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.