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Finding the Fourth Proportional to 656,665.80, 906,198.75 and 370,185.90

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Solution

The fourth proportional to 656,665.80, 906,198.75 and 370,185.90 is: 510,856.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,665.80 : 906,198.75 = 370,185.90 : x
  2. Step 2: Convert to fraction form
    656,665.80/906,198.75 = 370,185.90/x
  3. Step 3: Cross multiply
    656,665.80x = 906,198.75 × 370,185.90
  4. Step 4: Simplify right side
    656,665.80x = 335,461,999,847.63
  5. Step 5: Solve for x
    x = 335,461,999,847.63/656,665.80
  6. Step 6: Final answer
    x = 510,856.51

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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.