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Finding the Fourth Proportional to 492,639.76, 679,842.30 and 266,285.44

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Solution

The fourth proportional to 492,639.76, 679,842.30 and 266,285.44 is: 367,473.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,639.76 : 679,842.30 = 266,285.44 : x
  2. Step 2: Convert to fraction form
    492,639.76/679,842.30 = 266,285.44/x
  3. Step 3: Cross multiply
    492,639.76x = 679,842.30 × 266,285.44
  4. Step 4: Simplify right side
    492,639.76x = 181,032,105,986.11
  5. Step 5: Solve for x
    x = 181,032,105,986.11/492,639.76
  6. Step 6: Final answer
    x = 367,473.60

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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.