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Finding the Fourth Proportional to 553,624.20, 764,003.94 and 311,910.48

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Solution

The fourth proportional to 553,624.20, 764,003.94 and 311,910.48 is: 430,437.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,624.20 : 764,003.94 = 311,910.48 : x
  2. Step 2: Convert to fraction form
    553,624.20/764,003.94 = 311,910.48/x
  3. Step 3: Cross multiply
    553,624.20x = 764,003.94 × 311,910.48
  4. Step 4: Simplify right side
    553,624.20x = 238,300,835,647.29
  5. Step 5: Solve for x
    x = 238,300,835,647.29/553,624.20
  6. Step 6: Final answer
    x = 430,437.90

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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.