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Finding the Fourth Proportional to 389,012.98, 536,880.61 and 225,705.44

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Solution

The fourth proportional to 389,012.98, 536,880.61 and 225,705.44 is: 311,498.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,012.98 : 536,880.61 = 225,705.44 : x
  2. Step 2: Convert to fraction form
    389,012.98/536,880.61 = 225,705.44/x
  3. Step 3: Cross multiply
    389,012.98x = 536,880.61 × 225,705.44
  4. Step 4: Simplify right side
    389,012.98x = 121,176,874,307.52
  5. Step 5: Solve for x
    x = 121,176,874,307.52/389,012.98
  6. Step 6: Final answer
    x = 311,498.28

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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.