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Finding the Fourth Proportional to 479,718.75, 662,070.20 and 278,514.75

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Solution

The fourth proportional to 479,718.75, 662,070.20 and 278,514.75 is: 384,384.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,718.75 : 662,070.20 = 278,514.75 : x
  2. Step 2: Convert to fraction form
    479,718.75/662,070.20 = 278,514.75/x
  3. Step 3: Cross multiply
    479,718.75x = 662,070.20 × 278,514.75
  4. Step 4: Simplify right side
    479,718.75x = 184,396,314,842.88
  5. Step 5: Solve for x
    x = 184,396,314,842.88/479,718.75
  6. Step 6: Final answer
    x = 384,384.21

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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.