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Finding the Fourth Proportional to 891,492,793.12, 1,230,253,634.64 and 495,013,837.60

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Solution

The fourth proportional to 891,492,793.12, 1,230,253,634.64 and 495,013,837.60 is: 683,115,531.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,492,793.12 : 1,230,253,634.64 = 495,013,837.60 : x
  2. Step 2: Convert to fraction form
    891,492,793.12/1,230,253,634.64 = 495,013,837.60/x
  3. Step 3: Cross multiply
    891,492,793.12x = 1,230,253,634.64 × 495,013,837.60
  4. Step 4: Simplify right side
    891,492,793.12x = 608,992,572,904,494,720
  5. Step 5: Solve for x
    x = 608,992,572,904,494,720/891,492,793.12
  6. Step 6: Final answer
    x = 683,115,531.17

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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.