Home / 289,237.12-399,144.18-161,913.76

Finding the Fourth Proportional to 289,237.12, 399,144.18 and 161,913.76

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Solution

The fourth proportional to 289,237.12, 399,144.18 and 161,913.76 is: 223,439.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,237.12 : 399,144.18 = 161,913.76 : x
  2. Step 2: Convert to fraction form
    289,237.12/399,144.18 = 161,913.76/x
  3. Step 3: Cross multiply
    289,237.12x = 399,144.18 × 161,913.76
  4. Step 4: Simplify right side
    289,237.12x = 64,626,934,965.92
  5. Step 5: Solve for x
    x = 64,626,934,965.92/289,237.12
  6. Step 6: Final answer
    x = 223,439.28

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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.