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Finding the Fourth Proportional to 243,645, 336,321.72 and 183,390

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Solution

The fourth proportional to 243,645, 336,321.72 and 183,390 is: 253,147.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,645 : 336,321.72 = 183,390 : x
  2. Step 2: Convert to fraction form
    243,645/336,321.72 = 183,390/x
  3. Step 3: Cross multiply
    243,645x = 336,321.72 × 183,390
  4. Step 4: Simplify right side
    243,645x = 61,678,040,230.80
  5. Step 5: Solve for x
    x = 61,678,040,230.80/243,645
  6. Step 6: Final answer
    x = 253,147.16

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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.