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Finding the Fourth Proportional to 492,877.54, 679,715.85 and 311,273.38

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Solution

The fourth proportional to 492,877.54, 679,715.85 and 311,273.38 is: 429,269.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,877.54 : 679,715.85 = 311,273.38 : x
  2. Step 2: Convert to fraction form
    492,877.54/679,715.85 = 311,273.38/x
  3. Step 3: Cross multiply
    492,877.54x = 679,715.85 × 311,273.38
  4. Step 4: Simplify right side
    492,877.54x = 211,577,450,069.07
  5. Step 5: Solve for x
    x = 211,577,450,069.07/492,877.54
  6. Step 6: Final answer
    x = 429,269.81

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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.