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Finding the Fourth Proportional to 328,572.48, 492,919.38 and 103,989.36

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Solution

The fourth proportional to 328,572.48, 492,919.38 and 103,989.36 is: 156,003.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,572.48 : 492,919.38 = 103,989.36 : x
  2. Step 2: Convert to fraction form
    328,572.48/492,919.38 = 103,989.36/x
  3. Step 3: Cross multiply
    328,572.48x = 492,919.38 × 103,989.36
  4. Step 4: Simplify right side
    328,572.48x = 51,258,370,857.80
  5. Step 5: Solve for x
    x = 51,258,370,857.80/328,572.48
  6. Step 6: Final answer
    x = 156,003.24

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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.