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Finding the Fourth Proportional to 666,185.78, 919,636.60 and 424,792.82

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Solution

The fourth proportional to 666,185.78, 919,636.60 and 424,792.82 is: 586,405.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,185.78 : 919,636.60 = 424,792.82 : x
  2. Step 2: Convert to fraction form
    666,185.78/919,636.60 = 424,792.82/x
  3. Step 3: Cross multiply
    666,185.78x = 919,636.60 × 424,792.82
  4. Step 4: Simplify right side
    666,185.78x = 390,655,019,029.05
  5. Step 5: Solve for x
    x = 390,655,019,029.05/666,185.78
  6. Step 6: Final answer
    x = 586,405.52

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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.