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Finding the Fourth Proportional to 255,611.20, 383,416.80 and 145,019.20

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Solution

The fourth proportional to 255,611.20, 383,416.80 and 145,019.20 is: 217,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,611.20 : 383,416.80 = 145,019.20 : x
  2. Step 2: Convert to fraction form
    255,611.20/383,416.80 = 145,019.20/x
  3. Step 3: Cross multiply
    255,611.20x = 383,416.80 × 145,019.20
  4. Step 4: Simplify right side
    255,611.20x = 55,602,797,602.56
  5. Step 5: Solve for x
    x = 55,602,797,602.56/255,611.20
  6. Step 6: Final answer
    x = 217,528.80

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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.