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Finding the Fourth Proportional to 554,189.20, 764,765.70 and 312,469.72

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Solution

The fourth proportional to 554,189.20, 764,765.70 and 312,469.72 is: 431,199.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,189.20 : 764,765.70 = 312,469.72 : x
  2. Step 2: Convert to fraction form
    554,189.20/764,765.70 = 312,469.72/x
  3. Step 3: Cross multiply
    554,189.20x = 764,765.70 × 312,469.72
  4. Step 4: Simplify right side
    554,189.20x = 238,966,124,144.60
  5. Step 5: Solve for x
    x = 238,966,124,144.60/554,189.20
  6. Step 6: Final answer
    x = 431,199.53

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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.