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Finding the Fourth Proportional to 508,911.20, 764,120.10 and 284,719.40

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Solution

The fourth proportional to 508,911.20, 764,120.10 and 284,719.40 is: 427,500.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,911.20 : 764,120.10 = 284,719.40 : x
  2. Step 2: Convert to fraction form
    508,911.20/764,120.10 = 284,719.40/x
  3. Step 3: Cross multiply
    508,911.20x = 764,120.10 × 284,719.40
  4. Step 4: Simplify right side
    508,911.20x = 217,559,816,399.94
  5. Step 5: Solve for x
    x = 217,559,816,399.94/508,911.20
  6. Step 6: Final answer
    x = 427,500.55

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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.