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Finding the Fourth Proportional to 520,948.80, 781,269.60 and 205,300.80

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Solution

The fourth proportional to 520,948.80, 781,269.60 and 205,300.80 is: 307,890.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,948.80 : 781,269.60 = 205,300.80 : x
  2. Step 2: Convert to fraction form
    520,948.80/781,269.60 = 205,300.80/x
  3. Step 3: Cross multiply
    520,948.80x = 781,269.60 × 205,300.80
  4. Step 4: Simplify right side
    520,948.80x = 160,395,273,895.68
  5. Step 5: Solve for x
    x = 160,395,273,895.68/520,948.80
  6. Step 6: Final answer
    x = 307,890.67

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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.