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Finding the Fourth Proportional to 342,700.61, 472,911.39 and 189,728.06

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Solution

The fourth proportional to 342,700.61, 472,911.39 and 189,728.06 is: 261,816.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,700.61 : 472,911.39 = 189,728.06 : x
  2. Step 2: Convert to fraction form
    342,700.61/472,911.39 = 189,728.06/x
  3. Step 3: Cross multiply
    342,700.61x = 472,911.39 × 189,728.06
  4. Step 4: Simplify right side
    342,700.61x = 89,724,558,212.05
  5. Step 5: Solve for x
    x = 89,724,558,212.05/342,700.61
  6. Step 6: Final answer
    x = 261,816.17

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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.