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Finding the Fourth Proportional to 280,661.44, 387,318.36 and 153,344.92

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Solution

The fourth proportional to 280,661.44, 387,318.36 and 153,344.92 is: 211,619.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,661.44 : 387,318.36 = 153,344.92 : x
  2. Step 2: Convert to fraction form
    280,661.44/387,318.36 = 153,344.92/x
  3. Step 3: Cross multiply
    280,661.44x = 387,318.36 × 153,344.92
  4. Step 4: Simplify right side
    280,661.44x = 59,393,302,928.73
  5. Step 5: Solve for x
    x = 59,393,302,928.73/280,661.44
  6. Step 6: Final answer
    x = 211,619.03

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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.