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Finding the Fourth Proportional to 339,272.80, 508,909.20 and 102,590.80

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Solution

The fourth proportional to 339,272.80, 508,909.20 and 102,590.80 is: 153,886.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,272.80 : 508,909.20 = 102,590.80 : x
  2. Step 2: Convert to fraction form
    339,272.80/508,909.20 = 102,590.80/x
  3. Step 3: Cross multiply
    339,272.80x = 508,909.20 × 102,590.80
  4. Step 4: Simplify right side
    339,272.80x = 52,209,401,955.36
  5. Step 5: Solve for x
    x = 52,209,401,955.36/339,272.80
  6. Step 6: Final answer
    x = 153,886.20

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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.