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Finding the Fourth Proportional to 353,545.20, 530,350.20 and 143,139.60

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Solution

The fourth proportional to 353,545.20, 530,350.20 and 143,139.60 is: 214,722.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,545.20 : 530,350.20 = 143,139.60 : x
  2. Step 2: Convert to fraction form
    353,545.20/530,350.20 = 143,139.60/x
  3. Step 3: Cross multiply
    353,545.20x = 530,350.20 × 143,139.60
  4. Step 4: Simplify right side
    353,545.20x = 75,914,115,487.92
  5. Step 5: Solve for x
    x = 75,914,115,487.92/353,545.20
  6. Step 6: Final answer
    x = 214,722.52

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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.