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Finding the Fourth Proportional to 611,561.15, 843,975.70 and 339,633.56

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Solution

The fourth proportional to 611,561.15, 843,975.70 and 339,633.56 is: 468,706.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,561.15 : 843,975.70 = 339,633.56 : x
  2. Step 2: Convert to fraction form
    611,561.15/843,975.70 = 339,633.56/x
  3. Step 3: Cross multiply
    611,561.15x = 843,975.70 × 339,633.56
  4. Step 4: Simplify right side
    611,561.15x = 286,642,465,626.45
  5. Step 5: Solve for x
    x = 286,642,465,626.45/611,561.15
  6. Step 6: Final answer
    x = 468,706.14

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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.