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Finding the Fourth Proportional to 339,644.81, 509,484.53 and 86,927.38

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Solution

The fourth proportional to 339,644.81, 509,484.53 and 86,927.38 is: 130,395.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,644.81 : 509,484.53 = 86,927.38 : x
  2. Step 2: Convert to fraction form
    339,644.81/509,484.53 = 86,927.38/x
  3. Step 3: Cross multiply
    339,644.81x = 509,484.53 × 86,927.38
  4. Step 4: Simplify right side
    339,644.81x = 44,288,154,287.04
  5. Step 5: Solve for x
    x = 44,288,154,287.04/339,644.81
  6. Step 6: Final answer
    x = 130,395.50

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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.