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Finding the Fourth Proportional to 663,853,778.80, 995,780,668.20 and 319,480,010.80

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Solution

The fourth proportional to 663,853,778.80, 995,780,668.20 and 319,480,010.80 is: 479,220,016.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,853,778.80 : 995,780,668.20 = 319,480,010.80 : x
  2. Step 2: Convert to fraction form
    663,853,778.80/995,780,668.20 = 319,480,010.80/x
  3. Step 3: Cross multiply
    663,853,778.80x = 995,780,668.20 × 319,480,010.80
  4. Step 4: Simplify right side
    663,853,778.80x = 318,132,018,630,967,232
  5. Step 5: Solve for x
    x = 318,132,018,630,967,232/663,853,778.80
  6. Step 6: Final answer
    x = 479,220,016.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.