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Finding the Fourth Proportional to 218,775.70, 307,219.10 and 218,775.70

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Solution

The fourth proportional to 218,775.70, 307,219.10 and 218,775.70 is: 307,219.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,775.70 : 307,219.10 = 218,775.70 : x
  2. Step 2: Convert to fraction form
    218,775.70/307,219.10 = 218,775.70/x
  3. Step 3: Cross multiply
    218,775.70x = 307,219.10 × 218,775.70
  4. Step 4: Simplify right side
    218,775.70x = 67,212,073,655.87
  5. Step 5: Solve for x
    x = 67,212,073,655.87/218,775.70
  6. Step 6: Final answer
    x = 307,219.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.