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Finding the Fourth Proportional to 342,920.40, 514,380.60 and 216,949.20

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Solution

The fourth proportional to 342,920.40, 514,380.60 and 216,949.20 is: 325,423.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,920.40 : 514,380.60 = 216,949.20 : x
  2. Step 2: Convert to fraction form
    342,920.40/514,380.60 = 216,949.20/x
  3. Step 3: Cross multiply
    342,920.40x = 514,380.60 × 216,949.20
  4. Step 4: Simplify right side
    342,920.40x = 111,594,459,665.52
  5. Step 5: Solve for x
    x = 111,594,459,665.52/342,920.40
  6. Step 6: Final answer
    x = 325,423.80

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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.