Home / 715,590.48-987,514.20-393,321.36

Finding the Fourth Proportional to 715,590.48, 987,514.20 and 393,321.36

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Solution

The fourth proportional to 715,590.48, 987,514.20 and 393,321.36 is: 542,783.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,590.48 : 987,514.20 = 393,321.36 : x
  2. Step 2: Convert to fraction form
    715,590.48/987,514.20 = 393,321.36/x
  3. Step 3: Cross multiply
    715,590.48x = 987,514.20 × 393,321.36
  4. Step 4: Simplify right side
    715,590.48x = 388,410,428,163.31
  5. Step 5: Solve for x
    x = 388,410,428,163.31/715,590.48
  6. Step 6: Final answer
    x = 542,783.11

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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.