Home / 428,329.20-642,493.80-303,913.20

Finding the Fourth Proportional to 428,329.20, 642,493.80 and 303,913.20

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Solution

The fourth proportional to 428,329.20, 642,493.80 and 303,913.20 is: 455,869.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,329.20 : 642,493.80 = 303,913.20 : x
  2. Step 2: Convert to fraction form
    428,329.20/642,493.80 = 303,913.20/x
  3. Step 3: Cross multiply
    428,329.20x = 642,493.80 × 303,913.20
  4. Step 4: Simplify right side
    428,329.20x = 195,262,346,738.16
  5. Step 5: Solve for x
    x = 195,262,346,738.16/428,329.20
  6. Step 6: Final answer
    x = 455,869.80

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1.5x scale

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.