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Finding the Fourth Proportional to 339,153.78, 508,802.67 and 128,787.06

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Solution

The fourth proportional to 339,153.78, 508,802.67 and 128,787.06 is: 193,207.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,153.78 : 508,802.67 = 128,787.06 : x
  2. Step 2: Convert to fraction form
    339,153.78/508,802.67 = 128,787.06/x
  3. Step 3: Cross multiply
    339,153.78x = 508,802.67 × 128,787.06
  4. Step 4: Simplify right side
    339,153.78x = 65,527,199,989.45
  5. Step 5: Solve for x
    x = 65,527,199,989.45/339,153.78
  6. Step 6: Final answer
    x = 193,207.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.