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Finding the Fourth Proportional to 303,756.70, 455,635.05 and 215,110.30

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Solution

The fourth proportional to 303,756.70, 455,635.05 and 215,110.30 is: 322,665.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,756.70 : 455,635.05 = 215,110.30 : x
  2. Step 2: Convert to fraction form
    303,756.70/455,635.05 = 215,110.30/x
  3. Step 3: Cross multiply
    303,756.70x = 455,635.05 × 215,110.30
  4. Step 4: Simplify right side
    303,756.70x = 98,011,792,296.02
  5. Step 5: Solve for x
    x = 98,011,792,296.02/303,756.70
  6. Step 6: Final answer
    x = 322,665.45

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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.