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Finding the Fourth Proportional to 255,890.72, 353,316.84 and 165,299.60

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Solution

The fourth proportional to 255,890.72, 353,316.84 and 165,299.60 is: 228,234.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,890.72 : 353,316.84 = 165,299.60 : x
  2. Step 2: Convert to fraction form
    255,890.72/353,316.84 = 165,299.60/x
  3. Step 3: Cross multiply
    255,890.72x = 353,316.84 × 165,299.60
  4. Step 4: Simplify right side
    255,890.72x = 58,403,132,325.26
  5. Step 5: Solve for x
    x = 58,403,132,325.26/255,890.72
  6. Step 6: Final answer
    x = 228,234.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.