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Finding the Fourth Proportional to 280,812.92, 387,522.03 and 153,488.51

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Solution

The fourth proportional to 280,812.92, 387,522.03 and 153,488.51 is: 211,814.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,812.92 : 387,522.03 = 153,488.51 : x
  2. Step 2: Convert to fraction form
    280,812.92/387,522.03 = 153,488.51/x
  3. Step 3: Cross multiply
    280,812.92x = 387,522.03 × 153,488.51
  4. Step 4: Simplify right side
    280,812.92x = 59,480,179,945.68
  5. Step 5: Solve for x
    x = 59,480,179,945.68/280,812.92
  6. Step 6: Final answer
    x = 211,814.26

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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.