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Finding the Fourth Proportional to 279,458.64, 385,651.81 and 156,934.01

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Solution

The fourth proportional to 279,458.64, 385,651.81 and 156,934.01 is: 216,568.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,458.64 : 385,651.81 = 156,934.01 : x
  2. Step 2: Convert to fraction form
    279,458.64/385,651.81 = 156,934.01/x
  3. Step 3: Cross multiply
    279,458.64x = 385,651.81 × 156,934.01
  4. Step 4: Simplify right side
    279,458.64x = 60,521,885,007.06
  5. Step 5: Solve for x
    x = 60,521,885,007.06/279,458.64
  6. Step 6: Final answer
    x = 216,568.31

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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.