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Finding the Fourth Proportional to 280,687.26, 387,356.92 and 153,371.04

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Solution

The fourth proportional to 280,687.26, 387,356.92 and 153,371.04 is: 211,656.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,687.26 : 387,356.92 = 153,371.04 : x
  2. Step 2: Convert to fraction form
    280,687.26/387,356.92 = 153,371.04/x
  3. Step 3: Cross multiply
    280,687.26x = 387,356.92 × 153,371.04
  4. Step 4: Simplify right side
    280,687.26x = 59,409,333,671.60
  5. Step 5: Solve for x
    x = 59,409,333,671.60/280,687.26
  6. Step 6: Final answer
    x = 211,656.68

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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.