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Finding the Fourth Proportional to 320,021.42, 479,750.15 and 130,640.90

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Solution

The fourth proportional to 320,021.42, 479,750.15 and 130,640.90 is: 195,846.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,021.42 : 479,750.15 = 130,640.90 : x
  2. Step 2: Convert to fraction form
    320,021.42/479,750.15 = 130,640.90/x
  3. Step 3: Cross multiply
    320,021.42x = 479,750.15 × 130,640.90
  4. Step 4: Simplify right side
    320,021.42x = 62,674,989,298.99
  5. Step 5: Solve for x
    x = 62,674,989,298.99/320,021.42
  6. Step 6: Final answer
    x = 195,846.23

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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.