Home / 280,544.31-387,145.17-153,220.41

Finding the Fourth Proportional to 280,544.31, 387,145.17 and 153,220.41

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Solution

The fourth proportional to 280,544.31, 387,145.17 and 153,220.41 is: 211,440.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,544.31 : 387,145.17 = 153,220.41 : x
  2. Step 2: Convert to fraction form
    280,544.31/387,145.17 = 153,220.41/x
  3. Step 3: Cross multiply
    280,544.31x = 387,145.17 × 153,220.41
  4. Step 4: Simplify right side
    280,544.31x = 59,318,541,676.92
  5. Step 5: Solve for x
    x = 59,318,541,676.92/280,544.31
  6. Step 6: Final answer
    x = 211,440.90

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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.