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Finding the Fourth Proportional to 489,198.42, 674,807.76 and 307,622.88

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Solution

The fourth proportional to 489,198.42, 674,807.76 and 307,622.88 is: 424,339.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,198.42 : 674,807.76 = 307,622.88 : x
  2. Step 2: Convert to fraction form
    489,198.42/674,807.76 = 307,622.88/x
  3. Step 3: Cross multiply
    489,198.42x = 674,807.76 × 307,622.88
  4. Step 4: Simplify right side
    489,198.42x = 207,586,306,577.55
  5. Step 5: Solve for x
    x = 207,586,306,577.55/489,198.42
  6. Step 6: Final answer
    x = 424,339.69

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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.