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Finding the Fourth Proportional to 492,711.12, 679,943.08 and 266,356.64

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Solution

The fourth proportional to 492,711.12, 679,943.08 and 266,356.64 is: 367,573.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,711.12 : 679,943.08 = 266,356.64 : x
  2. Step 2: Convert to fraction form
    492,711.12/679,943.08 = 266,356.64/x
  3. Step 3: Cross multiply
    492,711.12x = 679,943.08 × 266,356.64
  4. Step 4: Simplify right side
    492,711.12x = 181,107,354,180.05
  5. Step 5: Solve for x
    x = 181,107,354,180.05/492,711.12
  6. Step 6: Final answer
    x = 367,573.10

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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.