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Finding the Fourth Proportional to 491,644.94, 678,482.66 and 276,792.62

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Solution

The fourth proportional to 491,644.94, 678,482.66 and 276,792.62 is: 381,980.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,644.94 : 678,482.66 = 276,792.62 : x
  2. Step 2: Convert to fraction form
    491,644.94/678,482.66 = 276,792.62/x
  3. Step 3: Cross multiply
    491,644.94x = 678,482.66 × 276,792.62
  4. Step 4: Simplify right side
    491,644.94x = 187,798,991,702.01
  5. Step 5: Solve for x
    x = 187,798,991,702.01/491,644.94
  6. Step 6: Final answer
    x = 381,980.93

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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.