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Finding the Fourth Proportional to 708,963.42, 978,201.24 and 403,015.62

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Solution

The fourth proportional to 708,963.42, 978,201.24 and 403,015.62 is: 556,065.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,963.42 : 978,201.24 = 403,015.62 : x
  2. Step 2: Convert to fraction form
    708,963.42/978,201.24 = 403,015.62/x
  3. Step 3: Cross multiply
    708,963.42x = 978,201.24 × 403,015.62
  4. Step 4: Simplify right side
    708,963.42x = 394,230,379,223.37
  5. Step 5: Solve for x
    x = 394,230,379,223.37/708,963.42
  6. Step 6: Final answer
    x = 556,065.90

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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.