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Finding the Fourth Proportional to 702,621.50, 969,749.03 and 400,815.50

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Solution

The fourth proportional to 702,621.50, 969,749.03 and 400,815.50 is: 553,200.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,621.50 : 969,749.03 = 400,815.50 : x
  2. Step 2: Convert to fraction form
    702,621.50/969,749.03 = 400,815.50/x
  3. Step 3: Cross multiply
    702,621.50x = 969,749.03 × 400,815.50
  4. Step 4: Simplify right side
    702,621.50x = 388,690,442,333.97
  5. Step 5: Solve for x
    x = 388,690,442,333.97/702,621.50
  6. Step 6: Final answer
    x = 553,200.33

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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.