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Finding the Fourth Proportional to 450,136.96, 621,164.64 and 248,920

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Solution

The fourth proportional to 450,136.96, 621,164.64 and 248,920 is: 343,496.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,136.96 : 621,164.64 = 248,920 : x
  2. Step 2: Convert to fraction form
    450,136.96/621,164.64 = 248,920/x
  3. Step 3: Cross multiply
    450,136.96x = 621,164.64 × 248,920
  4. Step 4: Simplify right side
    450,136.96x = 154,620,302,188.80
  5. Step 5: Solve for x
    x = 154,620,302,188.80/450,136.96
  6. Step 6: Final answer
    x = 343,496.13

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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.