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Finding the Fourth Proportional to 715,596.44, 987,529.25 and 393,314.04

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Solution

The fourth proportional to 715,596.44, 987,529.25 and 393,314.04 is: 542,776.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,596.44 : 987,529.25 = 393,314.04 : x
  2. Step 2: Convert to fraction form
    715,596.44/987,529.25 = 393,314.04/x
  3. Step 3: Cross multiply
    715,596.44x = 987,529.25 × 393,314.04
  4. Step 4: Simplify right side
    715,596.44x = 388,409,119,918.96
  5. Step 5: Solve for x
    x = 388,409,119,918.96/715,596.44
  6. Step 6: Final answer
    x = 542,776.77

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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.