Home / 764,885.70-1,147,656.60-390,908.70

Finding the Fourth Proportional to 764,885.70, 1,147,656.60 and 390,908.70

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Solution

The fourth proportional to 764,885.70, 1,147,656.60 and 390,908.70 is: 586,530.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,885.70 : 1,147,656.60 = 390,908.70 : x
  2. Step 2: Convert to fraction form
    764,885.70/1,147,656.60 = 390,908.70/x
  3. Step 3: Cross multiply
    764,885.70x = 1,147,656.60 × 390,908.70
  4. Step 4: Simplify right side
    764,885.70x = 448,628,949,552.42
  5. Step 5: Solve for x
    x = 448,628,949,552.42/764,885.70
  6. Step 6: Final answer
    x = 586,530.71

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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.