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Finding the Fourth Proportional to 255,400.78, 352,461.09 and 140,687.74

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Solution

The fourth proportional to 255,400.78, 352,461.09 and 140,687.74 is: 194,153.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,400.78 : 352,461.09 = 140,687.74 : x
  2. Step 2: Convert to fraction form
    255,400.78/352,461.09 = 140,687.74/x
  3. Step 3: Cross multiply
    255,400.78x = 352,461.09 × 140,687.74
  4. Step 4: Simplify right side
    255,400.78x = 49,586,954,190.04
  5. Step 5: Solve for x
    x = 49,586,954,190.04/255,400.78
  6. Step 6: Final answer
    x = 194,153.50

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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.