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Finding the Fourth Proportional to 500,533.96, 690,183.36 and 318,958.28

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Solution

The fourth proportional to 500,533.96, 690,183.36 and 318,958.28 is: 439,809.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,533.96 : 690,183.36 = 318,958.28 : x
  2. Step 2: Convert to fraction form
    500,533.96/690,183.36 = 318,958.28/x
  3. Step 3: Cross multiply
    500,533.96x = 690,183.36 × 318,958.28
  4. Step 4: Simplify right side
    500,533.96x = 220,139,697,390.22
  5. Step 5: Solve for x
    x = 220,139,697,390.22/500,533.96
  6. Step 6: Final answer
    x = 439,809.71

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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.