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Finding the Fourth Proportional to 255,385.78, 352,434.75 and 140,668.49

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Solution

The fourth proportional to 255,385.78, 352,434.75 and 140,668.49 is: 194,123.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,385.78 : 352,434.75 = 140,668.49 : x
  2. Step 2: Convert to fraction form
    255,385.78/352,434.75 = 140,668.49/x
  3. Step 3: Cross multiply
    255,385.78x = 352,434.75 × 140,668.49
  4. Step 4: Simplify right side
    255,385.78x = 49,576,464,987.11
  5. Step 5: Solve for x
    x = 49,576,464,987.11/255,385.78
  6. Step 6: Final answer
    x = 194,123.83

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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.