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Finding the Fourth Proportional to 339,369.32, 509,053.44 and 86,649.68

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Solution

The fourth proportional to 339,369.32, 509,053.44 and 86,649.68 is: 129,974.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,369.32 : 509,053.44 = 86,649.68 : x
  2. Step 2: Convert to fraction form
    339,369.32/509,053.44 = 86,649.68/x
  3. Step 3: Cross multiply
    339,369.32x = 509,053.44 × 86,649.68
  4. Step 4: Simplify right side
    339,369.32x = 44,109,317,678.90
  5. Step 5: Solve for x
    x = 44,109,317,678.90/339,369.32
  6. Step 6: Final answer
    x = 129,974.38

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1.5x scale

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.