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Finding the Fourth Proportional to 318,983.82, 478,459.82 and 119,289.54

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Solution

The fourth proportional to 318,983.82, 478,459.82 and 119,289.54 is: 178,928.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,983.82 : 478,459.82 = 119,289.54 : x
  2. Step 2: Convert to fraction form
    318,983.82/478,459.82 = 119,289.54/x
  3. Step 3: Cross multiply
    318,983.82x = 478,459.82 × 119,289.54
  4. Step 4: Simplify right side
    318,983.82x = 57,075,251,836.28
  5. Step 5: Solve for x
    x = 57,075,251,836.28/318,983.82
  6. Step 6: Final answer
    x = 178,928.36

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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.