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Finding the Fourth Proportional to 715,494.56, 987,399.60 and 393,235.25

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Solution

The fourth proportional to 715,494.56, 987,399.60 and 393,235.25 is: 542,674.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,494.56 : 987,399.60 = 393,235.25 : x
  2. Step 2: Convert to fraction form
    715,494.56/987,399.60 = 393,235.25/x
  3. Step 3: Cross multiply
    715,494.56x = 987,399.60 × 393,235.25
  4. Step 4: Simplify right side
    715,494.56x = 388,280,328,555.90
  5. Step 5: Solve for x
    x = 388,280,328,555.90/715,494.56
  6. Step 6: Final answer
    x = 542,674.05

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1.5x scale

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.