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Finding the Fourth Proportional to 492,912.45, 739,368.68 and 315,765.45

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Solution

The fourth proportional to 492,912.45, 739,368.68 and 315,765.45 is: 473,648.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,912.45 : 739,368.68 = 315,765.45 : x
  2. Step 2: Convert to fraction form
    492,912.45/739,368.68 = 315,765.45/x
  3. Step 3: Cross multiply
    492,912.45x = 739,368.68 × 315,765.45
  4. Step 4: Simplify right side
    492,912.45x = 233,467,082,377.28
  5. Step 5: Solve for x
    x = 233,467,082,377.28/492,912.45
  6. Step 6: Final answer
    x = 473,648.18

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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.