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Finding the Fourth Proportional to 311,919.70, 468,041.55 and 145,707.70

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Solution

The fourth proportional to 311,919.70, 468,041.55 and 145,707.70 is: 218,637.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,919.70 : 468,041.55 = 145,707.70 : x
  2. Step 2: Convert to fraction form
    311,919.70/468,041.55 = 145,707.70/x
  3. Step 3: Cross multiply
    311,919.70x = 468,041.55 × 145,707.70
  4. Step 4: Simplify right side
    311,919.70x = 68,197,257,754.94
  5. Step 5: Solve for x
    x = 68,197,257,754.94/311,919.70
  6. Step 6: Final answer
    x = 218,637.23

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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.