Home / 309,399.04-426,997.76-188,510.72

Finding the Fourth Proportional to 309,399.04, 426,997.76 and 188,510.72

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Solution

The fourth proportional to 309,399.04, 426,997.76 and 188,510.72 is: 260,161.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,399.04 : 426,997.76 = 188,510.72 : x
  2. Step 2: Convert to fraction form
    309,399.04/426,997.76 = 188,510.72/x
  3. Step 3: Cross multiply
    309,399.04x = 426,997.76 × 188,510.72
  4. Step 4: Simplify right side
    309,399.04x = 80,493,655,175.99
  5. Step 5: Solve for x
    x = 80,493,655,175.99/309,399.04
  6. Step 6: Final answer
    x = 260,161.30

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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.