Home / 494,816.90-742,132.40-139,828.55

Finding the Fourth Proportional to 494,816.90, 742,132.40 and 139,828.55

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Solution

The fourth proportional to 494,816.90, 742,132.40 and 139,828.55 is: 209,716.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,816.90 : 742,132.40 = 139,828.55 : x
  2. Step 2: Convert to fraction form
    494,816.90/742,132.40 = 139,828.55/x
  3. Step 3: Cross multiply
    494,816.90x = 742,132.40 × 139,828.55
  4. Step 4: Simplify right side
    494,816.90x = 103,771,292,990.22
  5. Step 5: Solve for x
    x = 103,771,292,990.22/494,816.90
  6. Step 6: Final answer
    x = 209,716.55

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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.