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Finding the Fourth Proportional to 279,345.69, 385,505.80 and 158,492.07

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Solution

The fourth proportional to 279,345.69, 385,505.80 and 158,492.07 is: 218,724.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,345.69 : 385,505.80 = 158,492.07 : x
  2. Step 2: Convert to fraction form
    279,345.69/385,505.80 = 158,492.07/x
  3. Step 3: Cross multiply
    279,345.69x = 385,505.80 × 158,492.07
  4. Step 4: Simplify right side
    279,345.69x = 61,099,611,842.78
  5. Step 5: Solve for x
    x = 61,099,611,842.78/279,345.69
  6. Step 6: Final answer
    x = 218,724.02

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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.