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Finding the Fourth Proportional to 610,916.45, 843,051.78 and 338,978.39

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Solution

The fourth proportional to 610,916.45, 843,051.78 and 338,978.39 is: 467,783.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,916.45 : 843,051.78 = 338,978.39 : x
  2. Step 2: Convert to fraction form
    610,916.45/843,051.78 = 338,978.39/x
  3. Step 3: Cross multiply
    610,916.45x = 843,051.78 × 338,978.39
  4. Step 4: Simplify right side
    610,916.45x = 285,776,330,855.78
  5. Step 5: Solve for x
    x = 285,776,330,855.78/610,916.45
  6. Step 6: Final answer
    x = 467,783.01

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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.