Home / 680,459.94-938,973.60-393,999.30

Finding the Fourth Proportional to 680,459.94, 938,973.60 and 393,999.30

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Solution

The fourth proportional to 680,459.94, 938,973.60 and 393,999.30 is: 543,683.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,459.94 : 938,973.60 = 393,999.30 : x
  2. Step 2: Convert to fraction form
    680,459.94/938,973.60 = 393,999.30/x
  3. Step 3: Cross multiply
    680,459.94x = 938,973.60 × 393,999.30
  4. Step 4: Simplify right side
    680,459.94x = 369,954,941,118.48
  5. Step 5: Solve for x
    x = 369,954,941,118.48/680,459.94
  6. Step 6: Final answer
    x = 543,683.65

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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.