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Finding the Fourth Proportional to 661,717,843.20, 992,614,089.60 and 201,671,020.80

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Solution

The fourth proportional to 661,717,843.20, 992,614,089.60 and 201,671,020.80 is: 302,517,906.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,717,843.20 : 992,614,089.60 = 201,671,020.80 : x
  2. Step 2: Convert to fraction form
    661,717,843.20/992,614,089.60 = 201,671,020.80/x
  3. Step 3: Cross multiply
    661,717,843.20x = 992,614,089.60 × 201,671,020.80
  4. Step 4: Simplify right side
    661,717,843.20x = 200,181,496,710,094,688
  5. Step 5: Solve for x
    x = 200,181,496,710,094,688/661,717,843.20
  6. Step 6: Final answer
    x = 302,517,906.64

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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.