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Finding the Fourth Proportional to 255,661.60, 352,814.78 and 142,491.64

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Solution

The fourth proportional to 255,661.60, 352,814.78 and 142,491.64 is: 196,639.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,661.60 : 352,814.78 = 142,491.64 : x
  2. Step 2: Convert to fraction form
    255,661.60/352,814.78 = 142,491.64/x
  3. Step 3: Cross multiply
    255,661.60x = 352,814.78 × 142,491.64
  4. Step 4: Simplify right side
    255,661.60x = 50,273,156,618.44
  5. Step 5: Solve for x
    x = 50,273,156,618.44/255,661.60
  6. Step 6: Final answer
    x = 196,639.45

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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.