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Finding the Fourth Proportional to 499,612.48, 689,423.36 and 281,809.12

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Solution

The fourth proportional to 499,612.48, 689,423.36 and 281,809.12 is: 388,872.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,612.48 : 689,423.36 = 281,809.12 : x
  2. Step 2: Convert to fraction form
    499,612.48/689,423.36 = 281,809.12/x
  3. Step 3: Cross multiply
    499,612.48x = 689,423.36 × 281,809.12
  4. Step 4: Simplify right side
    499,612.48x = 194,285,790,389.04
  5. Step 5: Solve for x
    x = 194,285,790,389.04/499,612.48
  6. Step 6: Final answer
    x = 388,872.97

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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.