Home / 715,835.64-987,853.83-393,551.22

Finding the Fourth Proportional to 715,835.64, 987,853.83 and 393,551.22

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Solution

The fourth proportional to 715,835.64, 987,853.83 and 393,551.22 is: 543,101.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,835.64 : 987,853.83 = 393,551.22 : x
  2. Step 2: Convert to fraction form
    715,835.64/987,853.83 = 393,551.22/x
  3. Step 3: Cross multiply
    715,835.64x = 987,853.83 × 393,551.22
  4. Step 4: Simplify right side
    715,835.64x = 388,771,079,978.17
  5. Step 5: Solve for x
    x = 388,771,079,978.17/715,835.64
  6. Step 6: Final answer
    x = 543,101.04

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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.