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Finding the Fourth Proportional to 561,405.58, 773,933.03 and 399,980.38

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Solution

The fourth proportional to 561,405.58, 773,933.03 and 399,980.38 is: 551,398.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,405.58 : 773,933.03 = 399,980.38 : x
  2. Step 2: Convert to fraction form
    561,405.58/773,933.03 = 399,980.38/x
  3. Step 3: Cross multiply
    561,405.58x = 773,933.03 × 399,980.38
  4. Step 4: Simplify right side
    561,405.58x = 309,558,026,450.27
  5. Step 5: Solve for x
    x = 309,558,026,450.27/561,405.58
  6. Step 6: Final answer
    x = 551,398.20

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1.5x scale

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.