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Finding the Fourth Proportional to 608,642.60, 839,775.89 and 393,523.81

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Solution

The fourth proportional to 608,642.60, 839,775.89 and 393,523.81 is: 542,965.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,642.60 : 839,775.89 = 393,523.81 : x
  2. Step 2: Convert to fraction form
    608,642.60/839,775.89 = 393,523.81/x
  3. Step 3: Cross multiply
    608,642.60x = 839,775.89 × 393,523.81
  4. Step 4: Simplify right side
    608,642.60x = 330,471,807,910.76
  5. Step 5: Solve for x
    x = 330,471,807,910.76/608,642.60
  6. Step 6: Final answer
    x = 542,965.29

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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.