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Finding the Fourth Proportional to 492,686.21, 679,907.97 and 266,331.71

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Solution

The fourth proportional to 492,686.21, 679,907.97 and 266,331.71 is: 367,538.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,686.21 : 679,907.97 = 266,331.71 : x
  2. Step 2: Convert to fraction form
    492,686.21/679,907.97 = 266,331.71/x
  3. Step 3: Cross multiply
    492,686.21x = 679,907.97 × 266,331.71
  4. Step 4: Simplify right side
    492,686.21x = 181,081,053,992.50
  5. Step 5: Solve for x
    x = 181,081,053,992.50/492,686.21
  6. Step 6: Final answer
    x = 367,538.30

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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.