Home / 685,319.29-945,839.58-394,875.22

Finding the Fourth Proportional to 685,319.29, 945,839.58 and 394,875.22

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Solution

The fourth proportional to 685,319.29, 945,839.58 and 394,875.22 is: 544,984.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,319.29 : 945,839.58 = 394,875.22 : x
  2. Step 2: Convert to fraction form
    685,319.29/945,839.58 = 394,875.22/x
  3. Step 3: Cross multiply
    685,319.29x = 945,839.58 × 394,875.22
  4. Step 4: Simplify right side
    685,319.29x = 373,488,612,237.21
  5. Step 5: Solve for x
    x = 373,488,612,237.21/685,319.29
  6. Step 6: Final answer
    x = 544,984.82

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1.5x scale

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.