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Finding the Fourth Proportional to 339,712.30, 509,566.63 and 86,992.30

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Solution

The fourth proportional to 339,712.30, 509,566.63 and 86,992.30 is: 130,487.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,712.30 : 509,566.63 = 86,992.30 : x
  2. Step 2: Convert to fraction form
    339,712.30/509,566.63 = 86,992.30/x
  3. Step 3: Cross multiply
    339,712.30x = 509,566.63 × 86,992.30
  4. Step 4: Simplify right side
    339,712.30x = 44,328,373,146.95
  5. Step 5: Solve for x
    x = 44,328,373,146.95/339,712.30
  6. Step 6: Final answer
    x = 130,487.98

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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.