Home / 1,218,032,753.67-1,680,840,190.49-661,103,843.31

Finding the Fourth Proportional to 1,218,032,753.67, 1,680,840,190.49 and 661,103,843.31

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Solution

The fourth proportional to 1,218,032,753.67, 1,680,840,190.49 and 661,103,843.31 is: 912,298,874.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,032,753.67 : 1,680,840,190.49 = 661,103,843.31 : x
  2. Step 2: Convert to fraction form
    1,218,032,753.67/1,680,840,190.49 = 661,103,843.31/x
  3. Step 3: Cross multiply
    1,218,032,753.67x = 1,680,840,190.49 × 661,103,843.31
  4. Step 4: Simplify right side
    1,218,032,753.67x = 1,111,209,909,919,545,856
  5. Step 5: Solve for x
    x = 1,111,209,909,919,545,856/1,218,032,753.67
  6. Step 6: Final answer
    x = 912,298,874.21

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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.