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Finding the Fourth Proportional to 306,641.52, 423,112.62 and 281,837.82

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Solution

The fourth proportional to 306,641.52, 423,112.62 and 281,837.82 is: 388,887.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,641.52 : 423,112.62 = 281,837.82 : x
  2. Step 2: Convert to fraction form
    306,641.52/423,112.62 = 281,837.82/x
  3. Step 3: Cross multiply
    306,641.52x = 423,112.62 × 281,837.82
  4. Step 4: Simplify right side
    306,641.52x = 119,249,138,435.29
  5. Step 5: Solve for x
    x = 119,249,138,435.29/306,641.52
  6. Step 6: Final answer
    x = 388,887.77

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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.