Home / 764,490.28-1,054,974.22-420,325.87

Finding the Fourth Proportional to 764,490.28, 1,054,974.22 and 420,325.87

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Solution

The fourth proportional to 764,490.28, 1,054,974.22 and 420,325.87 is: 580,037.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,490.28 : 1,054,974.22 = 420,325.87 : x
  2. Step 2: Convert to fraction form
    764,490.28/1,054,974.22 = 420,325.87/x
  3. Step 3: Cross multiply
    764,490.28x = 1,054,974.22 × 420,325.87
  4. Step 4: Simplify right side
    764,490.28x = 443,432,953,160.82
  5. Step 5: Solve for x
    x = 443,432,953,160.82/764,490.28
  6. Step 6: Final answer
    x = 580,037.40

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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.