Home / 715,911.22-987,948.61-393,618.50

Finding the Fourth Proportional to 715,911.22, 987,948.61 and 393,618.50

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Solution

The fourth proportional to 715,911.22, 987,948.61 and 393,618.50 is: 543,188.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,911.22 : 987,948.61 = 393,618.50 : x
  2. Step 2: Convert to fraction form
    715,911.22/987,948.61 = 393,618.50/x
  3. Step 3: Cross multiply
    715,911.22x = 987,948.61 × 393,618.50
  4. Step 4: Simplify right side
    715,911.22x = 388,874,849,945.29
  5. Step 5: Solve for x
    x = 388,874,849,945.29/715,911.22
  6. Step 6: Final answer
    x = 543,188.65

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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.