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Finding the Fourth Proportional to 494,228.89, 740,812.69 and 209,679.28

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Solution

The fourth proportional to 494,228.89, 740,812.69 and 209,679.28 is: 314,293.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,228.89 : 740,812.69 = 209,679.28 : x
  2. Step 2: Convert to fraction form
    494,228.89/740,812.69 = 209,679.28/x
  3. Step 3: Cross multiply
    494,228.89x = 740,812.69 × 209,679.28
  4. Step 4: Simplify right side
    494,228.89x = 155,333,072,851.76
  5. Step 5: Solve for x
    x = 155,333,072,851.76/494,228.89
  6. Step 6: Final answer
    x = 314,293.79

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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.