Home / 685,688.62-946,253.01-399,405.46

Finding the Fourth Proportional to 685,688.62, 946,253.01 and 399,405.46

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Solution

The fourth proportional to 685,688.62, 946,253.01 and 399,405.46 is: 551,181.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,688.62 : 946,253.01 = 399,405.46 : x
  2. Step 2: Convert to fraction form
    685,688.62/946,253.01 = 399,405.46/x
  3. Step 3: Cross multiply
    685,688.62x = 946,253.01 × 399,405.46
  4. Step 4: Simplify right side
    685,688.62x = 377,938,617,867.57
  5. Step 5: Solve for x
    x = 377,938,617,867.57/685,688.62
  6. Step 6: Final answer
    x = 551,181.12

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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.