Home / 695,427.20-1,043,140.80-428,321.60

Finding the Fourth Proportional to 695,427.20, 1,043,140.80 and 428,321.60

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Solution

The fourth proportional to 695,427.20, 1,043,140.80 and 428,321.60 is: 642,482.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,427.20 : 1,043,140.80 = 428,321.60 : x
  2. Step 2: Convert to fraction form
    695,427.20/1,043,140.80 = 428,321.60/x
  3. Step 3: Cross multiply
    695,427.20x = 1,043,140.80 × 428,321.60
  4. Step 4: Simplify right side
    695,427.20x = 446,799,736,481.28
  5. Step 5: Solve for x
    x = 446,799,736,481.28/695,427.20
  6. Step 6: Final answer
    x = 642,482.40

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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.