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Finding the Fourth Proportional to 207,000.45, 310,500.68 and 143,686.80

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Solution

The fourth proportional to 207,000.45, 310,500.68 and 143,686.80 is: 215,530.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,000.45 : 310,500.68 = 143,686.80 : x
  2. Step 2: Convert to fraction form
    207,000.45/310,500.68 = 143,686.80/x
  3. Step 3: Cross multiply
    207,000.45x = 310,500.68 × 143,686.80
  4. Step 4: Simplify right side
    207,000.45x = 44,614,848,388.59
  5. Step 5: Solve for x
    x = 44,614,848,388.59/207,000.45
  6. Step 6: Final answer
    x = 215,530.20

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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.