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Finding the Fourth Proportional to 328,498.20, 492,747.30 and 188,141.40

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Solution

The fourth proportional to 328,498.20, 492,747.30 and 188,141.40 is: 282,212.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,498.20 : 492,747.30 = 188,141.40 : x
  2. Step 2: Convert to fraction form
    328,498.20/492,747.30 = 188,141.40/x
  3. Step 3: Cross multiply
    328,498.20x = 492,747.30 × 188,141.40
  4. Step 4: Simplify right side
    328,498.20x = 92,706,166,868.22
  5. Step 5: Solve for x
    x = 92,706,166,868.22/328,498.20
  6. Step 6: Final answer
    x = 282,212.10

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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.