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Finding the Fourth Proportional to 328,921.68, 453,911.91 and 178,018.68

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Solution

The fourth proportional to 328,921.68, 453,911.91 and 178,018.68 is: 245,665.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,921.68 : 453,911.91 = 178,018.68 : x
  2. Step 2: Convert to fraction form
    328,921.68/453,911.91 = 178,018.68/x
  3. Step 3: Cross multiply
    328,921.68x = 453,911.91 × 178,018.68
  4. Step 4: Simplify right side
    328,921.68x = 80,804,799,054.48
  5. Step 5: Solve for x
    x = 80,804,799,054.48/328,921.68
  6. Step 6: Final answer
    x = 245,665.77

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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.