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Finding the Fourth Proportional to 265,668.80, 398,580.56 and 85,750.38

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Solution

The fourth proportional to 265,668.80, 398,580.56 and 85,750.38 is: 128,650.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,668.80 : 398,580.56 = 85,750.38 : x
  2. Step 2: Convert to fraction form
    265,668.80/398,580.56 = 85,750.38/x
  3. Step 3: Cross multiply
    265,668.80x = 398,580.56 × 85,750.38
  4. Step 4: Simplify right side
    265,668.80x = 34,178,434,051.86
  5. Step 5: Solve for x
    x = 34,178,434,051.86/265,668.80
  6. Step 6: Final answer
    x = 128,650.54

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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.