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Finding the Fourth Proportional to 438,965.60, 605,817.12 and 316,558.64

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Solution

The fourth proportional to 438,965.60, 605,817.12 and 316,558.64 is: 436,883.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,965.60 : 605,817.12 = 316,558.64 : x
  2. Step 2: Convert to fraction form
    438,965.60/605,817.12 = 316,558.64/x
  3. Step 3: Cross multiply
    438,965.60x = 605,817.12 × 316,558.64
  4. Step 4: Simplify right side
    438,965.60x = 191,776,643,595.92
  5. Step 5: Solve for x
    x = 191,776,643,595.92/438,965.60
  6. Step 6: Final answer
    x = 436,883.08

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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.