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Finding the Fourth Proportional to 401,387.90, 553,940.91 and 265,182.91

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Solution

The fourth proportional to 401,387.90, 553,940.91 and 265,182.91 is: 365,969.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,387.90 : 553,940.91 = 265,182.91 : x
  2. Step 2: Convert to fraction form
    401,387.90/553,940.91 = 265,182.91/x
  3. Step 3: Cross multiply
    401,387.90x = 553,940.91 × 265,182.91
  4. Step 4: Simplify right side
    401,387.90x = 146,895,659,712.14
  5. Step 5: Solve for x
    x = 146,895,659,712.14/401,387.90
  6. Step 6: Final answer
    x = 365,969.33

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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.