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Finding the Fourth Proportional to 520,039.90, 780,319.05 and 295,572.70

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Solution

The fourth proportional to 520,039.90, 780,319.05 and 295,572.70 is: 443,506.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,039.90 : 780,319.05 = 295,572.70 : x
  2. Step 2: Convert to fraction form
    520,039.90/780,319.05 = 295,572.70/x
  3. Step 3: Cross multiply
    520,039.90x = 780,319.05 × 295,572.70
  4. Step 4: Simplify right side
    520,039.90x = 230,641,008,469.94
  5. Step 5: Solve for x
    x = 230,641,008,469.94/520,039.90
  6. Step 6: Final answer
    x = 443,506.37

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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.