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Finding the Fourth Proportional to 675,936, 932,792.52 and 421,287

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Solution

The fourth proportional to 675,936, 932,792.52 and 421,287 is: 581,376.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,936 : 932,792.52 = 421,287 : x
  2. Step 2: Convert to fraction form
    675,936/932,792.52 = 421,287/x
  3. Step 3: Cross multiply
    675,936x = 932,792.52 × 421,287
  4. Step 4: Simplify right side
    675,936x = 392,973,362,373.24
  5. Step 5: Solve for x
    x = 392,973,362,373.24/675,936
  6. Step 6: Final answer
    x = 581,376.58

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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.