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Finding the Fourth Proportional to 323,910.90, 485,655.15 and 290,733.30

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Solution

The fourth proportional to 323,910.90, 485,655.15 and 290,733.30 is: 435,910.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,910.90 : 485,655.15 = 290,733.30 : x
  2. Step 2: Convert to fraction form
    323,910.90/485,655.15 = 290,733.30/x
  3. Step 3: Cross multiply
    323,910.90x = 485,655.15 × 290,733.30
  4. Step 4: Simplify right side
    323,910.90x = 141,196,124,421.50
  5. Step 5: Solve for x
    x = 141,196,124,421.50/323,910.90
  6. Step 6: Final answer
    x = 435,910.38

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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.