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Finding the Fourth Proportional to 665,629.60, 998,530.80 and 328,842.40

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Solution

The fourth proportional to 665,629.60, 998,530.80 and 328,842.40 is: 493,306.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,629.60 : 998,530.80 = 328,842.40 : x
  2. Step 2: Convert to fraction form
    665,629.60/998,530.80 = 328,842.40/x
  3. Step 3: Cross multiply
    665,629.60x = 998,530.80 × 328,842.40
  4. Step 4: Simplify right side
    665,629.60x = 328,359,264,745.92
  5. Step 5: Solve for x
    x = 328,359,264,745.92/665,629.60
  6. Step 6: Final answer
    x = 493,306.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.