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Finding the Fourth Proportional to 612,213.36, 918,414.72 and 312,531.36

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Solution

The fourth proportional to 612,213.36, 918,414.72 and 312,531.36 is: 468,845.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,213.36 : 918,414.72 = 312,531.36 : x
  2. Step 2: Convert to fraction form
    612,213.36/918,414.72 = 312,531.36/x
  3. Step 3: Cross multiply
    612,213.36x = 918,414.72 × 312,531.36
  4. Step 4: Simplify right side
    612,213.36x = 287,033,401,485.62
  5. Step 5: Solve for x
    x = 287,033,401,485.62/612,213.36
  6. Step 6: Final answer
    x = 468,845.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.