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Finding the Fourth Proportional to 449,878.59, 620,586.77 and 288,554.13

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Solution

The fourth proportional to 449,878.59, 620,586.77 and 288,554.13 is: 398,047.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,878.59 : 620,586.77 = 288,554.13 : x
  2. Step 2: Convert to fraction form
    449,878.59/620,586.77 = 288,554.13/x
  3. Step 3: Cross multiply
    449,878.59x = 620,586.77 × 288,554.13
  4. Step 4: Simplify right side
    449,878.59x = 179,072,874,064.09
  5. Step 5: Solve for x
    x = 179,072,874,064.09/449,878.59
  6. Step 6: Final answer
    x = 398,047.11

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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.