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Finding the Fourth Proportional to 339,968.90, 509,953.35 and 306,143.30

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Solution

The fourth proportional to 339,968.90, 509,953.35 and 306,143.30 is: 459,214.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,968.90 : 509,953.35 = 306,143.30 : x
  2. Step 2: Convert to fraction form
    339,968.90/509,953.35 = 306,143.30/x
  3. Step 3: Cross multiply
    339,968.90x = 509,953.35 × 306,143.30
  4. Step 4: Simplify right side
    339,968.90x = 156,118,801,415.06
  5. Step 5: Solve for x
    x = 156,118,801,415.06/339,968.90
  6. Step 6: Final answer
    x = 459,214.95

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1.5x scale

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.