Home / 918,745.56-1,378,513.62-319,380.39

Finding the Fourth Proportional to 918,745.56, 1,378,513.62 and 319,380.39

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Solution

The fourth proportional to 918,745.56, 1,378,513.62 and 319,380.39 is: 479,207.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,745.56 : 1,378,513.62 = 319,380.39 : x
  2. Step 2: Convert to fraction form
    918,745.56/1,378,513.62 = 319,380.39/x
  3. Step 3: Cross multiply
    918,745.56x = 1,378,513.62 × 319,380.39
  4. Step 4: Simplify right side
    918,745.56x = 440,270,217,575.91
  5. Step 5: Solve for x
    x = 440,270,217,575.91/918,745.56
  6. Step 6: Final answer
    x = 479,207.99

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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.