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Finding the Fourth Proportional to 297,281.69, 445,990.66 and 128,830.30

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Solution

The fourth proportional to 297,281.69, 445,990.66 and 128,830.30 is: 193,274.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,281.69 : 445,990.66 = 128,830.30 : x
  2. Step 2: Convert to fraction form
    297,281.69/445,990.66 = 128,830.30/x
  3. Step 3: Cross multiply
    297,281.69x = 445,990.66 × 128,830.30
  4. Step 4: Simplify right side
    297,281.69x = 57,457,109,087.95
  5. Step 5: Solve for x
    x = 57,457,109,087.95/297,281.69
  6. Step 6: Final answer
    x = 193,274.97

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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.