Home / 715,922.69-987,977.02-393,653.55

Finding the Fourth Proportional to 715,922.69, 987,977.02 and 393,653.55

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Solution

The fourth proportional to 715,922.69, 987,977.02 and 393,653.55 is: 543,243.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,922.69 : 987,977.02 = 393,653.55 : x
  2. Step 2: Convert to fraction form
    715,922.69/987,977.02 = 393,653.55/x
  3. Step 3: Cross multiply
    715,922.69x = 987,977.02 × 393,653.55
  4. Step 4: Simplify right side
    715,922.69x = 388,920,657,471.40
  5. Step 5: Solve for x
    x = 388,920,657,471.40/715,922.69
  6. Step 6: Final answer
    x = 543,243.93

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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.