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Finding the Fourth Proportional to 393,617.76, 543,099.78 and 291,878.52

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Solution

The fourth proportional to 393,617.76, 543,099.78 and 291,878.52 is: 402,723.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,617.76 : 543,099.78 = 291,878.52 : x
  2. Step 2: Convert to fraction form
    393,617.76/543,099.78 = 291,878.52/x
  3. Step 3: Cross multiply
    393,617.76x = 543,099.78 × 291,878.52
  4. Step 4: Simplify right side
    393,617.76x = 158,519,159,998.73
  5. Step 5: Solve for x
    x = 158,519,159,998.73/393,617.76
  6. Step 6: Final answer
    x = 402,723.60

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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.