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Finding the Fourth Proportional to 218,775.40, 328,163.10 and 209,444.20

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Solution

The fourth proportional to 218,775.40, 328,163.10 and 209,444.20 is: 314,166.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,775.40 : 328,163.10 = 209,444.20 : x
  2. Step 2: Convert to fraction form
    218,775.40/328,163.10 = 209,444.20/x
  3. Step 3: Cross multiply
    218,775.40x = 328,163.10 × 209,444.20
  4. Step 4: Simplify right side
    218,775.40x = 68,731,857,949.02
  5. Step 5: Solve for x
    x = 68,731,857,949.02/218,775.40
  6. Step 6: Final answer
    x = 314,166.30

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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.