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Finding the Fourth Proportional to 378,666.72, 522,560.05 and 208,900.85

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Solution

The fourth proportional to 378,666.72, 522,560.05 and 208,900.85 is: 288,283.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,666.72 : 522,560.05 = 208,900.85 : x
  2. Step 2: Convert to fraction form
    378,666.72/522,560.05 = 208,900.85/x
  3. Step 3: Cross multiply
    378,666.72x = 522,560.05 × 208,900.85
  4. Step 4: Simplify right side
    378,666.72x = 109,163,235,485.99
  5. Step 5: Solve for x
    x = 109,163,235,485.99/378,666.72
  6. Step 6: Final answer
    x = 288,283.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.