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Finding the Fourth Proportional to 298,345.56, 447,533.09 and 85,144.89

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Solution

The fourth proportional to 298,345.56, 447,533.09 and 85,144.89 is: 127,721.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,345.56 : 447,533.09 = 85,144.89 : x
  2. Step 2: Convert to fraction form
    298,345.56/447,533.09 = 85,144.89/x
  3. Step 3: Cross multiply
    298,345.56x = 447,533.09 × 85,144.89
  4. Step 4: Simplify right side
    298,345.56x = 38,105,155,293.69
  5. Step 5: Solve for x
    x = 38,105,155,293.69/298,345.56
  6. Step 6: Final answer
    x = 127,721.54

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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.