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Finding the Fourth Proportional to 339,649.40, 509,457.90 and 114,987.80

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Solution

The fourth proportional to 339,649.40, 509,457.90 and 114,987.80 is: 172,476.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,649.40 : 509,457.90 = 114,987.80 : x
  2. Step 2: Convert to fraction form
    339,649.40/509,457.90 = 114,987.80/x
  3. Step 3: Cross multiply
    339,649.40x = 509,457.90 × 114,987.80
  4. Step 4: Simplify right side
    339,649.40x = 58,581,443,113.62
  5. Step 5: Solve for x
    x = 58,581,443,113.62/339,649.40
  6. Step 6: Final answer
    x = 172,476.22

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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.