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Finding the Fourth Proportional to 339,695.40, 509,478.30 and 103,045.80

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Solution

The fourth proportional to 339,695.40, 509,478.30 and 103,045.80 is: 154,549.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,695.40 : 509,478.30 = 103,045.80 : x
  2. Step 2: Convert to fraction form
    339,695.40/509,478.30 = 103,045.80/x
  3. Step 3: Cross multiply
    339,695.40x = 509,478.30 × 103,045.80
  4. Step 4: Simplify right side
    339,695.40x = 52,499,599,006.14
  5. Step 5: Solve for x
    x = 52,499,599,006.14/339,695.40
  6. Step 6: Final answer
    x = 154,549.04

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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.