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Finding the Fourth Proportional to 450,621.01, 621,857.55 and 280,855

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Solution

The fourth proportional to 450,621.01, 621,857.55 and 280,855 is: 387,580.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,621.01 : 621,857.55 = 280,855 : x
  2. Step 2: Convert to fraction form
    450,621.01/621,857.55 = 280,855/x
  3. Step 3: Cross multiply
    450,621.01x = 621,857.55 × 280,855
  4. Step 4: Simplify right side
    450,621.01x = 174,651,802,205.25
  5. Step 5: Solve for x
    x = 174,651,802,205.25/450,621.01
  6. Step 6: Final answer
    x = 387,580.25

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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.