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Finding the Fourth Proportional to 323,378.88, 485,317.40 and 260,353.20

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Solution

The fourth proportional to 323,378.88, 485,317.40 and 260,353.20 is: 390,730.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,378.88 : 485,317.40 = 260,353.20 : x
  2. Step 2: Convert to fraction form
    323,378.88/485,317.40 = 260,353.20/x
  3. Step 3: Cross multiply
    323,378.88x = 485,317.40 × 260,353.20
  4. Step 4: Simplify right side
    323,378.88x = 126,353,938,105.68
  5. Step 5: Solve for x
    x = 126,353,938,105.68/323,378.88
  6. Step 6: Final answer
    x = 390,730.33

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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.