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Finding the Fourth Proportional to 339,968.85, 509,953.28 and 318,973.65

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Solution

The fourth proportional to 339,968.85, 509,953.28 and 318,973.65 is: 478,460.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,968.85 : 509,953.28 = 318,973.65 : x
  2. Step 2: Convert to fraction form
    339,968.85/509,953.28 = 318,973.65/x
  3. Step 3: Cross multiply
    339,968.85x = 509,953.28 × 318,973.65
  4. Step 4: Simplify right side
    339,968.85x = 162,661,657,456.20
  5. Step 5: Solve for x
    x = 162,661,657,456.20/339,968.85
  6. Step 6: Final answer
    x = 478,460.48

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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.