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Finding the Fourth Proportional to 279,457.58, 421,069.28 and 230,631.32

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Solution

The fourth proportional to 279,457.58, 421,069.28 and 230,631.32 is: 347,500.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,457.58 : 421,069.28 = 230,631.32 : x
  2. Step 2: Convert to fraction form
    279,457.58/421,069.28 = 230,631.32/x
  3. Step 3: Cross multiply
    279,457.58x = 421,069.28 × 230,631.32
  4. Step 4: Simplify right side
    279,457.58x = 97,111,763,857.85
  5. Step 5: Solve for x
    x = 97,111,763,857.85/279,457.58
  6. Step 6: Final answer
    x = 347,500.91

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.