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Finding the Fourth Proportional to 328,556.72, 492,888.24 and 128,768.76

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Solution

The fourth proportional to 328,556.72, 492,888.24 and 128,768.76 is: 193,173.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,556.72 : 492,888.24 = 128,768.76 : x
  2. Step 2: Convert to fraction form
    328,556.72/492,888.24 = 128,768.76/x
  3. Step 3: Cross multiply
    328,556.72x = 492,888.24 × 128,768.76
  4. Step 4: Simplify right side
    328,556.72x = 63,468,607,483.38
  5. Step 5: Solve for x
    x = 63,468,607,483.38/328,556.72
  6. Step 6: Final answer
    x = 193,173.97

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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.