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Finding the Fourth Proportional to 678,090.48, 935,766.72 and 372,169.32

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Solution

The fourth proportional to 678,090.48, 935,766.72 and 372,169.32 is: 513,594.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,090.48 : 935,766.72 = 372,169.32 : x
  2. Step 2: Convert to fraction form
    678,090.48/935,766.72 = 372,169.32/x
  3. Step 3: Cross multiply
    678,090.48x = 935,766.72 × 372,169.32
  4. Step 4: Simplify right side
    678,090.48x = 348,263,663,861.03
  5. Step 5: Solve for x
    x = 348,263,663,861.03/678,090.48
  6. Step 6: Final answer
    x = 513,594.68

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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.