Home / 280,636.32-387,286.74-153,320.16

Finding the Fourth Proportional to 280,636.32, 387,286.74 and 153,320.16

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Solution

The fourth proportional to 280,636.32, 387,286.74 and 153,320.16 is: 211,586.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,636.32 : 387,286.74 = 153,320.16 : x
  2. Step 2: Convert to fraction form
    280,636.32/387,286.74 = 153,320.16/x
  3. Step 3: Cross multiply
    280,636.32x = 387,286.74 × 153,320.16
  4. Step 4: Simplify right side
    280,636.32x = 59,378,864,942.68
  5. Step 5: Solve for x
    x = 59,378,864,942.68/280,636.32
  6. Step 6: Final answer
    x = 211,586.53

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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.