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Finding the Fourth Proportional to 715,556.32, 987,491.32 and 393,277.84

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Solution

The fourth proportional to 715,556.32, 987,491.32 and 393,277.84 is: 542,736.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,556.32 : 987,491.32 = 393,277.84 : x
  2. Step 2: Convert to fraction form
    715,556.32/987,491.32 = 393,277.84/x
  3. Step 3: Cross multiply
    715,556.32x = 987,491.32 × 393,277.84
  4. Step 4: Simplify right side
    715,556.32x = 388,358,453,348.35
  5. Step 5: Solve for x
    x = 388,358,453,348.35/715,556.32
  6. Step 6: Final answer
    x = 542,736.39

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Double scale
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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.