Home / 564,480.20-778,979.94-309,835.72

Finding the Fourth Proportional to 564,480.20, 778,979.94 and 309,835.72

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Solution

The fourth proportional to 564,480.20, 778,979.94 and 309,835.72 is: 427,571.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,480.20 : 778,979.94 = 309,835.72 : x
  2. Step 2: Convert to fraction form
    564,480.20/778,979.94 = 309,835.72/x
  3. Step 3: Cross multiply
    564,480.20x = 778,979.94 × 309,835.72
  4. Step 4: Simplify right side
    564,480.20x = 241,355,810,575.46
  5. Step 5: Solve for x
    x = 241,355,810,575.46/564,480.20
  6. Step 6: Final answer
    x = 427,571.79

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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.