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Finding the Fourth Proportional to 393,698.90, 543,393.36 and 240,864.51

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Solution

The fourth proportional to 393,698.90, 543,393.36 and 240,864.51 is: 332,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,698.90 : 543,393.36 = 240,864.51 : x
  2. Step 2: Convert to fraction form
    393,698.90/543,393.36 = 240,864.51/x
  3. Step 3: Cross multiply
    393,698.90x = 543,393.36 × 240,864.51
  4. Step 4: Simplify right side
    393,698.90x = 130,884,175,393.65
  5. Step 5: Solve for x
    x = 130,884,175,393.65/393,698.90
  6. Step 6: Final answer
    x = 332,447.40

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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.