Home / 764,740.60-1,147,264.02-428,259.76

Finding the Fourth Proportional to 764,740.60, 1,147,264.02 and 428,259.76

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Solution

The fourth proportional to 764,740.60, 1,147,264.02 and 428,259.76 is: 642,475.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,740.60 : 1,147,264.02 = 428,259.76 : x
  2. Step 2: Convert to fraction form
    764,740.60/1,147,264.02 = 428,259.76/x
  3. Step 3: Cross multiply
    764,740.60x = 1,147,264.02 × 428,259.76
  4. Step 4: Simplify right side
    764,740.60x = 491,327,013,861.84
  5. Step 5: Solve for x
    x = 491,327,013,861.84/764,740.60
  6. Step 6: Final answer
    x = 642,475.39

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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.