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Finding the Fourth Proportional to 328,591.32, 492,887.07 and 139,002.54

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Solution

The fourth proportional to 328,591.32, 492,887.07 and 139,002.54 is: 208,503.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,591.32 : 492,887.07 = 139,002.54 : x
  2. Step 2: Convert to fraction form
    328,591.32/492,887.07 = 139,002.54/x
  3. Step 3: Cross multiply
    328,591.32x = 492,887.07 × 139,002.54
  4. Step 4: Simplify right side
    328,591.32x = 68,512,554,663.16
  5. Step 5: Solve for x
    x = 68,512,554,663.16/328,591.32
  6. Step 6: Final answer
    x = 208,503.85

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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.