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Finding the Fourth Proportional to 438,938.46, 605,715.12 and 275,679.30

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Solution

The fourth proportional to 438,938.46, 605,715.12 and 275,679.30 is: 380,424.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,938.46 : 605,715.12 = 275,679.30 : x
  2. Step 2: Convert to fraction form
    438,938.46/605,715.12 = 275,679.30/x
  3. Step 3: Cross multiply
    438,938.46x = 605,715.12 × 275,679.30
  4. Step 4: Simplify right side
    438,938.46x = 166,983,120,281.02
  5. Step 5: Solve for x
    x = 166,983,120,281.02/438,938.46
  6. Step 6: Final answer
    x = 380,424.90

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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.