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Finding the Fourth Proportional to 571,760.40, 789,009.32 and 317,135.28

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Solution

The fourth proportional to 571,760.40, 789,009.32 and 317,135.28 is: 437,635.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,760.40 : 789,009.32 = 317,135.28 : x
  2. Step 2: Convert to fraction form
    571,760.40/789,009.32 = 317,135.28/x
  3. Step 3: Cross multiply
    571,760.40x = 789,009.32 × 317,135.28
  4. Step 4: Simplify right side
    571,760.40x = 250,222,691,620.81
  5. Step 5: Solve for x
    x = 250,222,691,620.81/571,760.40
  6. Step 6: Final answer
    x = 437,635.58

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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.