Home / 715,927.66-987,953.61-393,618.58

Finding the Fourth Proportional to 715,927.66, 987,953.61 and 393,618.58

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Solution

The fourth proportional to 715,927.66, 987,953.61 and 393,618.58 is: 543,179.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,927.66 : 987,953.61 = 393,618.58 : x
  2. Step 2: Convert to fraction form
    715,927.66/987,953.61 = 393,618.58/x
  3. Step 3: Cross multiply
    715,927.66x = 987,953.61 × 393,618.58
  4. Step 4: Simplify right side
    715,927.66x = 388,876,897,074.07
  5. Step 5: Solve for x
    x = 388,876,897,074.07/715,927.66
  6. Step 6: Final answer
    x = 543,179.04

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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.