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Finding the Fourth Proportional to 279,481.71, 384,830.55 and 210,671.13

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Solution

The fourth proportional to 279,481.71, 384,830.55 and 210,671.13 is: 290,082.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,481.71 : 384,830.55 = 210,671.13 : x
  2. Step 2: Convert to fraction form
    279,481.71/384,830.55 = 210,671.13/x
  3. Step 3: Cross multiply
    279,481.71x = 384,830.55 × 210,671.13
  4. Step 4: Simplify right side
    279,481.71x = 81,072,686,827.02
  5. Step 5: Solve for x
    x = 81,072,686,827.02/279,481.71
  6. Step 6: Final answer
    x = 290,082.26

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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.