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Finding the Fourth Proportional to 529,007.40, 792,344.70 and 279,397.80

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Solution

The fourth proportional to 529,007.40, 792,344.70 and 279,397.80 is: 418,480.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,007.40 : 792,344.70 = 279,397.80 : x
  2. Step 2: Convert to fraction form
    529,007.40/792,344.70 = 279,397.80/x
  3. Step 3: Cross multiply
    529,007.40x = 792,344.70 × 279,397.80
  4. Step 4: Simplify right side
    529,007.40x = 221,379,366,021.66
  5. Step 5: Solve for x
    x = 221,379,366,021.66/529,007.40
  6. Step 6: Final answer
    x = 418,480.66

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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.