Home / 715,723.37-987,710.52-393,447.05

Finding the Fourth Proportional to 715,723.37, 987,710.52 and 393,447.05

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Solution

The fourth proportional to 715,723.37, 987,710.52 and 393,447.05 is: 542,963.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,723.37 : 987,710.52 = 393,447.05 : x
  2. Step 2: Convert to fraction form
    715,723.37/987,710.52 = 393,447.05/x
  3. Step 3: Cross multiply
    715,723.37x = 987,710.52 × 393,447.05
  4. Step 4: Simplify right side
    715,723.37x = 388,611,790,347.97
  5. Step 5: Solve for x
    x = 388,611,790,347.97/715,723.37
  6. Step 6: Final answer
    x = 542,963.67

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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.