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Finding the Fourth Proportional to 279,345.51, 385,505.55 and 158,491.89

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Solution

The fourth proportional to 279,345.51, 385,505.55 and 158,491.89 is: 218,723.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,345.51 : 385,505.55 = 158,491.89 : x
  2. Step 2: Convert to fraction form
    279,345.51/385,505.55 = 158,491.89/x
  3. Step 3: Cross multiply
    279,345.51x = 385,505.55 × 158,491.89
  4. Step 4: Simplify right side
    279,345.51x = 61,099,503,224.99
  5. Step 5: Solve for x
    x = 61,099,503,224.99/279,345.51
  6. Step 6: Final answer
    x = 218,723.77

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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.