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Finding the Fourth Proportional to 678,703.50, 936,693.45 and 392,225.94

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Solution

The fourth proportional to 678,703.50, 936,693.45 and 392,225.94 is: 541,319.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,703.50 : 936,693.45 = 392,225.94 : x
  2. Step 2: Convert to fraction form
    678,703.50/936,693.45 = 392,225.94/x
  3. Step 3: Cross multiply
    678,703.50x = 936,693.45 × 392,225.94
  4. Step 4: Simplify right side
    678,703.50x = 367,395,468,918.09
  5. Step 5: Solve for x
    x = 367,395,468,918.09/678,703.50
  6. Step 6: Final answer
    x = 541,319.54

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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.