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Finding the Fourth Proportional to 571,719.80, 789,021.78 and 317,153

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Solution

The fourth proportional to 571,719.80, 789,021.78 and 317,153 is: 437,698.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,719.80 : 789,021.78 = 317,153 : x
  2. Step 2: Convert to fraction form
    571,719.80/789,021.78 = 317,153/x
  3. Step 3: Cross multiply
    571,719.80x = 789,021.78 × 317,153
  4. Step 4: Simplify right side
    571,719.80x = 250,240,624,592.34
  5. Step 5: Solve for x
    x = 250,240,624,592.34/571,719.80
  6. Step 6: Final answer
    x = 437,698.02

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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.