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Finding the Fourth Proportional to 279,045.83, 385,080.54 and 151,721.43

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Solution

The fourth proportional to 279,045.83, 385,080.54 and 151,721.43 is: 209,374.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,045.83 : 385,080.54 = 151,721.43 : x
  2. Step 2: Convert to fraction form
    279,045.83/385,080.54 = 151,721.43/x
  3. Step 3: Cross multiply
    279,045.83x = 385,080.54 × 151,721.43
  4. Step 4: Simplify right side
    279,045.83x = 58,424,967,509.96
  5. Step 5: Solve for x
    x = 58,424,967,509.96/279,045.83
  6. Step 6: Final answer
    x = 209,374.09

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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.