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Finding the Fourth Proportional to 339,588.55, 509,400.27 and 86,871.23

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Solution

The fourth proportional to 339,588.55, 509,400.27 and 86,871.23 is: 130,311.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,588.55 : 509,400.27 = 86,871.23 : x
  2. Step 2: Convert to fraction form
    339,588.55/509,400.27 = 86,871.23/x
  3. Step 3: Cross multiply
    339,588.55x = 509,400.27 × 86,871.23
  4. Step 4: Simplify right side
    339,588.55x = 44,252,226,915.42
  5. Step 5: Solve for x
    x = 44,252,226,915.42/339,588.55
  6. Step 6: Final answer
    x = 130,311.30

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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.