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Finding the Fourth Proportional to 439,668.74, 606,808.08 and 278,538.74

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Solution

The fourth proportional to 439,668.74, 606,808.08 and 278,538.74 is: 384,424.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,668.74 : 606,808.08 = 278,538.74 : x
  2. Step 2: Convert to fraction form
    439,668.74/606,808.08 = 278,538.74/x
  3. Step 3: Cross multiply
    439,668.74x = 606,808.08 × 278,538.74
  4. Step 4: Simplify right side
    439,668.74x = 169,019,558,025.02
  5. Step 5: Solve for x
    x = 169,019,558,025.02/439,668.74
  6. Step 6: Final answer
    x = 384,424.78

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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.