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Finding the Fourth Proportional to 820,254.60, 1,230,266.70 and 259,345.80

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Solution

The fourth proportional to 820,254.60, 1,230,266.70 and 259,345.80 is: 388,982.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,254.60 : 1,230,266.70 = 259,345.80 : x
  2. Step 2: Convert to fraction form
    820,254.60/1,230,266.70 = 259,345.80/x
  3. Step 3: Cross multiply
    820,254.60x = 1,230,266.70 × 259,345.80
  4. Step 4: Simplify right side
    820,254.60x = 319,064,501,524.86
  5. Step 5: Solve for x
    x = 319,064,501,524.86/820,254.60
  6. Step 6: Final answer
    x = 388,982.28

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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.