Home / 405,239.15-607,315.33-315,390.35

Finding the Fourth Proportional to 405,239.15, 607,315.33 and 315,390.35

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Solution

The fourth proportional to 405,239.15, 607,315.33 and 315,390.35 is: 472,662.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,239.15 : 607,315.33 = 315,390.35 : x
  2. Step 2: Convert to fraction form
    405,239.15/607,315.33 = 315,390.35/x
  3. Step 3: Cross multiply
    405,239.15x = 607,315.33 × 315,390.35
  4. Step 4: Simplify right side
    405,239.15x = 191,541,394,489.07
  5. Step 5: Solve for x
    x = 191,541,394,489.07/405,239.15
  6. Step 6: Final answer
    x = 472,662.61

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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.