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Finding the Fourth Proportional to 494,630.55, 742,062.80 and 393,809.85

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Solution

The fourth proportional to 494,630.55, 742,062.80 and 393,809.85 is: 590,807.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,630.55 : 742,062.80 = 393,809.85 : x
  2. Step 2: Convert to fraction form
    494,630.55/742,062.80 = 393,809.85/x
  3. Step 3: Cross multiply
    494,630.55x = 742,062.80 × 393,809.85
  4. Step 4: Simplify right side
    494,630.55x = 292,231,640,943.11
  5. Step 5: Solve for x
    x = 292,231,640,943.11/494,630.55
  6. Step 6: Final answer
    x = 590,807.91

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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.