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Finding the Fourth Proportional to 279,457.65, 385,650.42 and 156,933

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Solution

The fourth proportional to 279,457.65, 385,650.42 and 156,933 is: 216,566.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,457.65 : 385,650.42 = 156,933 : x
  2. Step 2: Convert to fraction form
    279,457.65/385,650.42 = 156,933/x
  3. Step 3: Cross multiply
    279,457.65x = 385,650.42 × 156,933
  4. Step 4: Simplify right side
    279,457.65x = 60,521,277,361.86
  5. Step 5: Solve for x
    x = 60,521,277,361.86/279,457.65
  6. Step 6: Final answer
    x = 216,566.90

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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.