Home / 719,405.90-992,780.33-397,116.21

Finding the Fourth Proportional to 719,405.90, 992,780.33 and 397,116.21

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Solution

The fourth proportional to 719,405.90, 992,780.33 and 397,116.21 is: 548,020.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,405.90 : 992,780.33 = 397,116.21 : x
  2. Step 2: Convert to fraction form
    719,405.90/992,780.33 = 397,116.21/x
  3. Step 3: Cross multiply
    719,405.90x = 992,780.33 × 397,116.21
  4. Step 4: Simplify right side
    719,405.90x = 394,249,162,508.52
  5. Step 5: Solve for x
    x = 394,249,162,508.52/719,405.90
  6. Step 6: Final answer
    x = 548,020.48

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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.