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Finding the Fourth Proportional to 280,668.02, 387,211.91 and 173,051.21

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Solution

The fourth proportional to 280,668.02, 387,211.91 and 173,051.21 is: 238,742.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,668.02 : 387,211.91 = 173,051.21 : x
  2. Step 2: Convert to fraction form
    280,668.02/387,211.91 = 173,051.21/x
  3. Step 3: Cross multiply
    280,668.02x = 387,211.91 × 173,051.21
  4. Step 4: Simplify right side
    280,668.02x = 67,007,486,750.60
  5. Step 5: Solve for x
    x = 67,007,486,750.60/280,668.02
  6. Step 6: Final answer
    x = 238,742.87

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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.