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Finding the Fourth Proportional to 339,605.20, 509,425.23 and 86,887.86

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Solution

The fourth proportional to 339,605.20, 509,425.23 and 86,887.86 is: 130,336.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,605.20 : 509,425.23 = 86,887.86 : x
  2. Step 2: Convert to fraction form
    339,605.20/509,425.23 = 86,887.86/x
  3. Step 3: Cross multiply
    339,605.20x = 509,425.23 × 86,887.86
  4. Step 4: Simplify right side
    339,605.20x = 44,262,870,045.35
  5. Step 5: Solve for x
    x = 44,262,870,045.35/339,605.20
  6. Step 6: Final answer
    x = 130,336.26

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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.