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Finding the Fourth Proportional to 399,322.74, 551,648.33 and 345,514.34

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Solution

The fourth proportional to 399,322.74, 551,648.33 and 345,514.34 is: 477,314.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,322.74 : 551,648.33 = 345,514.34 : x
  2. Step 2: Convert to fraction form
    399,322.74/551,648.33 = 345,514.34/x
  3. Step 3: Cross multiply
    399,322.74x = 551,648.33 × 345,514.34
  4. Step 4: Simplify right side
    399,322.74x = 190,602,408,652.05
  5. Step 5: Solve for x
    x = 190,602,408,652.05/399,322.74
  6. Step 6: Final answer
    x = 477,314.19

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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.