Home / 680,277.89-938,822.27-389,937.78

Finding the Fourth Proportional to 680,277.89, 938,822.27 and 389,937.78

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Solution

The fourth proportional to 680,277.89, 938,822.27 and 389,937.78 is: 538,136.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,277.89 : 938,822.27 = 389,937.78 : x
  2. Step 2: Convert to fraction form
    680,277.89/938,822.27 = 389,937.78/x
  3. Step 3: Cross multiply
    680,277.89x = 938,822.27 × 389,937.78
  4. Step 4: Simplify right side
    680,277.89x = 366,082,269,828.67
  5. Step 5: Solve for x
    x = 366,082,269,828.67/680,277.89
  6. Step 6: Final answer
    x = 538,136.36

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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.