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Finding the Fourth Proportional to 503,792.20, 755,688.30 and 389,630.80

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Solution

The fourth proportional to 503,792.20, 755,688.30 and 389,630.80 is: 584,446.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,792.20 : 755,688.30 = 389,630.80 : x
  2. Step 2: Convert to fraction form
    503,792.20/755,688.30 = 389,630.80/x
  3. Step 3: Cross multiply
    503,792.20x = 755,688.30 × 389,630.80
  4. Step 4: Simplify right side
    503,792.20x = 294,439,436,879.64
  5. Step 5: Solve for x
    x = 294,439,436,879.64/503,792.20
  6. Step 6: Final answer
    x = 584,446.20

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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.