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Finding the Fourth Proportional to 339,699.40, 509,549.10 and 103,030.60

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Solution

The fourth proportional to 339,699.40, 509,549.10 and 103,030.60 is: 154,545.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,699.40 : 509,549.10 = 103,030.60 : x
  2. Step 2: Convert to fraction form
    339,699.40/509,549.10 = 103,030.60/x
  3. Step 3: Cross multiply
    339,699.40x = 509,549.10 × 103,030.60
  4. Step 4: Simplify right side
    339,699.40x = 52,499,149,502.46
  5. Step 5: Solve for x
    x = 52,499,149,502.46/339,699.40
  6. Step 6: Final answer
    x = 154,545.90

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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.