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Finding the Fourth Proportional to 612,514.39, 918,958.49 and 313,205.21

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Solution

The fourth proportional to 612,514.39, 918,958.49 and 313,205.21 is: 469,903.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,514.39 : 918,958.49 = 313,205.21 : x
  2. Step 2: Convert to fraction form
    612,514.39/918,958.49 = 313,205.21/x
  3. Step 3: Cross multiply
    612,514.39x = 918,958.49 × 313,205.21
  4. Step 4: Simplify right side
    612,514.39x = 287,822,589,922.14
  5. Step 5: Solve for x
    x = 287,822,589,922.14/612,514.39
  6. Step 6: Final answer
    x = 469,903.39

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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.