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Finding the Fourth Proportional to 399,556, 551,153.76 and 248,701.60

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Solution

The fourth proportional to 399,556, 551,153.76 and 248,701.60 is: 343,062.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,556 : 551,153.76 = 248,701.60 : x
  2. Step 2: Convert to fraction form
    399,556/551,153.76 = 248,701.60/x
  3. Step 3: Cross multiply
    399,556x = 551,153.76 × 248,701.60
  4. Step 4: Simplify right side
    399,556x = 137,072,821,958.02
  5. Step 5: Solve for x
    x = 137,072,821,958.02/399,556
  6. Step 6: Final answer
    x = 343,062.85

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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.