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Finding the Fourth Proportional to 255,858.40, 383,269.20 and 144,920.80

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Solution

The fourth proportional to 255,858.40, 383,269.20 and 144,920.80 is: 217,087.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,858.40 : 383,269.20 = 144,920.80 : x
  2. Step 2: Convert to fraction form
    255,858.40/383,269.20 = 144,920.80/x
  3. Step 3: Cross multiply
    255,858.40x = 383,269.20 × 144,920.80
  4. Step 4: Simplify right side
    255,858.40x = 55,543,679,079.36
  5. Step 5: Solve for x
    x = 55,543,679,079.36/255,858.40
  6. Step 6: Final answer
    x = 217,087.57

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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.