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Finding the Fourth Proportional to 255,629.80, 383,444.70 and 193,421.80

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Solution

The fourth proportional to 255,629.80, 383,444.70 and 193,421.80 is: 290,132.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,629.80 : 383,444.70 = 193,421.80 : x
  2. Step 2: Convert to fraction form
    255,629.80/383,444.70 = 193,421.80/x
  3. Step 3: Cross multiply
    255,629.80x = 383,444.70 × 193,421.80
  4. Step 4: Simplify right side
    255,629.80x = 74,166,564,074.46
  5. Step 5: Solve for x
    x = 74,166,564,074.46/255,629.80
  6. Step 6: Final answer
    x = 290,132.70

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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.