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Finding the Fourth Proportional to 489,147.60, 733,721.40 and 312,000.60

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Solution

The fourth proportional to 489,147.60, 733,721.40 and 312,000.60 is: 468,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,147.60 : 733,721.40 = 312,000.60 : x
  2. Step 2: Convert to fraction form
    489,147.60/733,721.40 = 312,000.60/x
  3. Step 3: Cross multiply
    489,147.60x = 733,721.40 × 312,000.60
  4. Step 4: Simplify right side
    489,147.60x = 228,921,517,032.84
  5. Step 5: Solve for x
    x = 228,921,517,032.84/489,147.60
  6. Step 6: Final answer
    x = 468,000.90

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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.