Home / 485,835.24-670,105.58-421,188.96

Finding the Fourth Proportional to 485,835.24, 670,105.58 and 421,188.96

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Solution

The fourth proportional to 485,835.24, 670,105.58 and 421,188.96 is: 580,939.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,835.24 : 670,105.58 = 421,188.96 : x
  2. Step 2: Convert to fraction form
    485,835.24/670,105.58 = 421,188.96/x
  3. Step 3: Cross multiply
    485,835.24x = 670,105.58 × 421,188.96
  4. Step 4: Simplify right side
    485,835.24x = 282,241,072,330.40
  5. Step 5: Solve for x
    x = 282,241,072,330.40/485,835.24
  6. Step 6: Final answer
    x = 580,939.89

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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.