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Finding the Fourth Proportional to 274,635, 379,002.06 and 155,403

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Solution

The fourth proportional to 274,635, 379,002.06 and 155,403 is: 214,459.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,635 : 379,002.06 = 155,403 : x
  2. Step 2: Convert to fraction form
    274,635/379,002.06 = 155,403/x
  3. Step 3: Cross multiply
    274,635x = 379,002.06 × 155,403
  4. Step 4: Simplify right side
    274,635x = 58,898,057,130.18
  5. Step 5: Solve for x
    x = 58,898,057,130.18/274,635
  6. Step 6: Final answer
    x = 214,459.40

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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.