Home / 699,039.90-964,665.85-393,116.19

Finding the Fourth Proportional to 699,039.90, 964,665.85 and 393,116.19

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Solution

The fourth proportional to 699,039.90, 964,665.85 and 393,116.19 is: 542,495.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,039.90 : 964,665.85 = 393,116.19 : x
  2. Step 2: Convert to fraction form
    699,039.90/964,665.85 = 393,116.19/x
  3. Step 3: Cross multiply
    699,039.90x = 964,665.85 × 393,116.19
  4. Step 4: Simplify right side
    699,039.90x = 379,225,763,575.11
  5. Step 5: Solve for x
    x = 379,225,763,575.11/699,039.90
  6. Step 6: Final answer
    x = 542,495.16

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Double scale
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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.