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Finding the Fourth Proportional to 328,717.76, 453,632.64 and 192,721.28

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Solution

The fourth proportional to 328,717.76, 453,632.64 and 192,721.28 is: 265,956.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,717.76 : 453,632.64 = 192,721.28 : x
  2. Step 2: Convert to fraction form
    328,717.76/453,632.64 = 192,721.28/x
  3. Step 3: Cross multiply
    328,717.76x = 453,632.64 × 192,721.28
  4. Step 4: Simplify right side
    328,717.76x = 87,424,663,030.58
  5. Step 5: Solve for x
    x = 87,424,663,030.58/328,717.76
  6. Step 6: Final answer
    x = 265,956.62

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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.