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Finding the Fourth Proportional to 339,987.40, 508,814.70 and 311,993.80

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Solution

The fourth proportional to 339,987.40, 508,814.70 and 311,993.80 is: 466,920.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,987.40 : 508,814.70 = 311,993.80 : x
  2. Step 2: Convert to fraction form
    339,987.40/508,814.70 = 311,993.80/x
  3. Step 3: Cross multiply
    339,987.40x = 508,814.70 × 311,993.80
  4. Step 4: Simplify right side
    339,987.40x = 158,747,031,748.86
  5. Step 5: Solve for x
    x = 158,747,031,748.86/339,987.40
  6. Step 6: Final answer
    x = 466,920.34

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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.