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Finding the Fourth Proportional to 279,163.12, 385,210.14 and 188,715.88

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Solution

The fourth proportional to 279,163.12, 385,210.14 and 188,715.88 is: 260,404.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,163.12 : 385,210.14 = 188,715.88 : x
  2. Step 2: Convert to fraction form
    279,163.12/385,210.14 = 188,715.88/x
  3. Step 3: Cross multiply
    279,163.12x = 385,210.14 × 188,715.88
  4. Step 4: Simplify right side
    279,163.12x = 72,695,270,555.02
  5. Step 5: Solve for x
    x = 72,695,270,555.02/279,163.12
  6. Step 6: Final answer
    x = 260,404.28

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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.