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Finding the Fourth Proportional to 339,807.38, 509,699.49 and 87,090.35

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Solution

The fourth proportional to 339,807.38, 509,699.49 and 87,090.35 is: 130,632.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,807.38 : 509,699.49 = 87,090.35 : x
  2. Step 2: Convert to fraction form
    339,807.38/509,699.49 = 87,090.35/x
  3. Step 3: Cross multiply
    339,807.38x = 509,699.49 × 87,090.35
  4. Step 4: Simplify right side
    339,807.38x = 44,389,904,430.42
  5. Step 5: Solve for x
    x = 44,389,904,430.42/339,807.38
  6. Step 6: Final answer
    x = 130,632.55

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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.