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Finding the Fourth Proportional to 655,448,003.80, 983,172,005.70 and 267,059,111.20

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Solution

The fourth proportional to 655,448,003.80, 983,172,005.70 and 267,059,111.20 is: 400,588,666.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,448,003.80 : 983,172,005.70 = 267,059,111.20 : x
  2. Step 2: Convert to fraction form
    655,448,003.80/983,172,005.70 = 267,059,111.20/x
  3. Step 3: Cross multiply
    655,448,003.80x = 983,172,005.70 × 267,059,111.20
  4. Step 4: Simplify right side
    655,448,003.80x = 262,565,041,998,963,328
  5. Step 5: Solve for x
    x = 262,565,041,998,963,328/655,448,003.80
  6. Step 6: Final answer
    x = 400,588,666.80

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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.