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Finding the Fourth Proportional to 403,000.81, 556,141.11 and 221,708.84

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Solution

The fourth proportional to 403,000.81, 556,141.11 and 221,708.84 is: 305,958.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,000.81 : 556,141.11 = 221,708.84 : x
  2. Step 2: Convert to fraction form
    403,000.81/556,141.11 = 221,708.84/x
  3. Step 3: Cross multiply
    403,000.81x = 556,141.11 × 221,708.84
  4. Step 4: Simplify right side
    403,000.81x = 123,301,400,374.41
  5. Step 5: Solve for x
    x = 123,301,400,374.41/403,000.81
  6. Step 6: Final answer
    x = 305,958.19

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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.