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Finding the Fourth Proportional to 620,490.09, 856,183.05 and 348,505.86

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Solution

The fourth proportional to 620,490.09, 856,183.05 and 348,505.86 is: 480,885.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,490.09 : 856,183.05 = 348,505.86 : x
  2. Step 2: Convert to fraction form
    620,490.09/856,183.05 = 348,505.86/x
  3. Step 3: Cross multiply
    620,490.09x = 856,183.05 × 348,505.86
  4. Step 4: Simplify right side
    620,490.09x = 298,384,810,157.67
  5. Step 5: Solve for x
    x = 298,384,810,157.67/620,490.09
  6. Step 6: Final answer
    x = 480,885.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.