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Finding the Fourth Proportional to 207,686.80, 311,530.20 and 155,198.80

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Solution

The fourth proportional to 207,686.80, 311,530.20 and 155,198.80 is: 232,798.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,686.80 : 311,530.20 = 155,198.80 : x
  2. Step 2: Convert to fraction form
    207,686.80/311,530.20 = 155,198.80/x
  3. Step 3: Cross multiply
    207,686.80x = 311,530.20 × 155,198.80
  4. Step 4: Simplify right side
    207,686.80x = 48,349,113,203.76
  5. Step 5: Solve for x
    x = 48,349,113,203.76/207,686.80
  6. Step 6: Final answer
    x = 232,798.20

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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.