Home / 715,851.39-987,875.55-393,566.97

Finding the Fourth Proportional to 715,851.39, 987,875.55 and 393,566.97

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Solution

The fourth proportional to 715,851.39, 987,875.55 and 393,566.97 is: 543,122.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,851.39 : 987,875.55 = 393,566.97 : x
  2. Step 2: Convert to fraction form
    715,851.39/987,875.55 = 393,566.97/x
  3. Step 3: Cross multiply
    715,851.39x = 987,875.55 × 393,566.97
  4. Step 4: Simplify right side
    715,851.39x = 388,795,186,950.58
  5. Step 5: Solve for x
    x = 388,795,186,950.58/715,851.39
  6. Step 6: Final answer
    x = 543,122.77

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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.