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Finding the Fourth Proportional to 665,628.60, 998,588.70 and 328,830.60

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Solution

The fourth proportional to 665,628.60, 998,588.70 and 328,830.60 is: 493,317.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,628.60 : 998,588.70 = 328,830.60 : x
  2. Step 2: Convert to fraction form
    665,628.60/998,588.70 = 328,830.60/x
  3. Step 3: Cross multiply
    665,628.60x = 998,588.70 × 328,830.60
  4. Step 4: Simplify right side
    665,628.60x = 328,366,521,374.22
  5. Step 5: Solve for x
    x = 328,366,521,374.22/665,628.60
  6. Step 6: Final answer
    x = 493,317.93

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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.